Properties of Number
Click on number to see Concepts connected with it.
0
Can be partitioned 1 way.
n/a
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1
Can be partitioned 1 way.
n/a
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2
Can be partitioned 2 ways.
Prime
The 3th Fibonacci Number.
The 1st Mersenne prime number.
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3
Can be partitioned 3 ways.
Prime
The 2nd mersenne number.
triangular number
The 4th Fibonacci Number.
The 1st Delannoy Number.
5
Can be partitioned 7 ways.
Prime
The 8th Fibonacci Number.
The 3rd catalan number.
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6
Can be partitioned 11 ways.
2x3
The 3rd triangular number.
The 2nd hexagonal number.
The 2nd Schröder number.
7
Can be partitioned 15 ways.
The 4th prime number.
The 3rd Mersenne prime number.
The 4th mersenne number.
The 4th odd number.
The 4th Lucas number.
The 3rd lucky number.
Sum of the first 4 Fibonacci numbers= 1 + 1 + 2 + 3 = 7
Difference of the first two cube numbers = 23 - 13 = 8 - 1 = 7
Sum of the 2nd odd & 2nd even numbers = 3 + 4 = 7
Sum of the 1st & 3rd prime numbers= 2 + 5 = 7
Sum of the 1st & 3rd factorials= 1 + 6 = 7
Sum of the 1st & 3rd triangular numbers= 1 + 6 = 7
8
Can be partitioned 22 ways.
2x2x2
The 5th Fibonacci Number.
9
Can be partitioned 30 ways.
3x3
The 5th odd number.
The 4th composite number.
The 2nd octagonal pyramidal number.
(sum of 1st two octagonal #s = 1+ 8 = 9)
The 4th lucky number.
Sum of the first two cube numbers= 1 + 8 = 9
Sum of the first three odd numbers.
Sum of the first three factorials= 1 + 2 + 6 = 9
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10
Can be partitioned 42 ways.
2x5
The 5th even number.
The 5th composite number.
The 4th triangular number.
(Sum of the 1st four numbers = 1 + 2 + 3 + 4 = 10)
The 3rd tetrahedral number.
(Sum of the 1st three triangular numbers = 1 + 3 + 6 = 10)
Product of the 1st even & 3rd odd numbers = 2 x 5 = 10
Product of the 1st & 3rd prime numbers= 2 x 5 = 10
Product of the 3rd & 5th Fibonacci numbers= 2 x 5 = 10
Sum of the 1st three prime numbers = 2 + 3 + 5 = 10
Sum of the 3rd, 4th, 5th Fibonacci numbers= 2 + 3 + 5 = 10
Sum of the 1st & 3rd Square Numbers= 12 + 32 = 1 + 9 = 10
Sum of the 1st & 4th even numbers = 2 + 8 = 10
Sum of the 2nd & 4th odd numbers = 3 + 7 = 10
Sum of the 2nd & 3rd,(2n - 1): 3 + 7 = 10
Sum of the 2nd & 3rd even numbers = 4 + 6 = 10
11
Can be partitioned 56 ways.
Prime
The 4th super catalan number
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12
Can be partitioned 77 ways.
2x2x3
The 1st abundant number
13
Can be partitioned 101 ways.
The 6th prime number.
The 7th Fibonacci number.
The 7th odd number.
The 5th lucky number.
The 3rd centered Square Number.
The 2nd Delannoy Number.
Sum of the 2nd & 3rd Square Numbers= 4 + 9 = 13
Sum of the 1st perfect number & 4th prime number= 6 + 7 = 13
The hypotenuse of the Pythagorean 5-12-13 triangle= 13
14
Can be partitioned 135 ways.
2x7
The 7th even number.
The 7th composite number.
The 4th catalan number.
The 3rd pyramidal number = 1, 5, 14
Product of the 1st even & 4th odd numbers = 2 x 7 = 14
Sum of the 1st, 2nd, & 4th triangular numbers= 1 + 3 + 10 = 14
Sum of the 1st, 3rd, and 4th prime numbers= 2 + 5 + 7 = 14
Sum of the 1st and 7th Fibonacci numbers= 1 + 13 = 14
Sum of the 1st & 6th even numbers = 2 + 12 = 14
Sum of the 2nd & 5th even numbers = 4 + 10 = 14
Sum of the 3rd & 4th even numbers = 6 + 8 = 14
Sum of the 2nd, 3rd, 4th, 5th numbers = 2 + 3 + 4 + 5 = 14
15
Can be partitioned 176 ways.
3x5
The 5th triangular number.
The 3rd hexagonal number.
The 4th mersenne number.
16
Can be partitioned 231 ways.
2x2x2x2
Square Number
The 3rd centered pentagonal number.
The 2nd truncated tetrahedal number.
17
Can be partitioned 297 ways.
Prime
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18
Can be partitioned 385 ways.
2x3x3
Pentagonal Pyramidal Number
The 3rd heptagonal number.
The 2nd abundant number
19
Can be partitioned 490 ways.
Prime
The 4th centered triangular number.
The 3rd octahedral number.
20
Can be partitioned 627 ways.
2x2x5
The 1st abundant number.
21
Can be partitioned 792 ways.
3x7
triangular number
The 3rd octagonal number.
The 8th Fibonacci Number.
22
Can be partitioned 1002 ways.
2x11
Twenty-two is the number of writable regular polygons in an Euclidiean circle: 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 30, 36, 40, 45, 60, 72, 90, 120, 180, 360. These are twenty-two of the twenty-four dividers of 360, the two first, 1 and 2, not defining polygons.
The 3rd Schröder number.
23
Can be partitioned 1255 ways.
Prime
Every positive whole number can be written as the sum of eight cubes (including 0^3 when necessary) EXCEPT 23 and 239. Those two numbers require 9 cubes.
24
Can be partitioned 1575 ways.
2x2x2x3
The 3rd nonagonal number.
The 3rd abundant number.
Product of the 1st and 6th even numbers = 2 x 12 = 24The 12th even number = 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24
Product of the 1st and 6th even numbers = 2 x 12 = 24
Product of the 2nd and 3rd even numbers = 4 x 6 = 24
Product of the 1st composite & 1st perfect number 4 x 6 = 24
Product of the 2nd triangular & 2nd cube numbers = 3 x 8 = 24
Sum of the 5th and 6th prime numbers 11 + 13 = 24
The 4th abundant number= 12, 18, 20, 24
Factorial 4 = 4! = 4 x 3 x 2 x 1 = 24
25
Can be partitioned 1958 ways.
5x5
The 13th odd number.
The 5th Square Number.
The 4th centered Square Number.
Sum of the first 5 odd numbers.
Sum of the 3rd and 4th Square Numbers = 9+16=25
(Pythagorean 3-4-5 right triangle)
26
Can be partitioned 2436 ways.
2x13
The 13th even number.
The 3rd heptagonal pyramidal number.
Product of the 1st even and 7th odd numbers = 2 x 13 = 26
Sum of the 1st & 5th Square Numbers = 12 + 52 = 1 + 25 = 26
Sum of the 6th & 7th even numbers = 12 + 14 = 26
Sum of the 5th, 6th, and 7th Fibonacci numbers = 5 + 8 + 13 = 26
Sum of the 5th through 8th numbers: 5 + 6 + 7 + 8 = 26
Sum of the 1st four Mersenne numbers.
Difference in the 2nd pair of amicable numbers = 1210 - 1184 = 26
27
Can be partitioned 3010 ways.
3x3x3
The 3rd decagonal number.
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28
Can be partitioned 3718 ways.
2x2x7
The 4th hexagonal number.
The 4th perfect number.
29
Can be partitioned 4565 ways.
The 10th prime number.
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30
Can be partitioned 5604 ways.
2x3x5
The 5th abundant number
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31
Can be partitioned 6842 ways.
prime
The 5th mersenne number.
The 3rd Mersenne prime number.
The 5th centered triangular number.
The 4th centered pentagonal number.
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32
Can be partitioned 8349 ways.
2x2x2x2x2
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33
Can be partitioned 10143 ways.
3x11
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34
Can be partitioned 12310 ways.
2x17
The 9th Fibonacci Number
The 4th heptagonal number.
35
Can be partitioned 14883 ways.
5x7
The 3rd centered cube number.
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36
Can be partitioned 17977 ways.
2x2x3x3
The 8th triangular number.
The 6th Square Number.
The 6th abundant number.
37
Can be partitioned 21637ways.
prime
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38
Can be partitioned ways.
2x19
The 2nd truncated octahedral number.
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39
Can be partitioned 26015 ways.
3x13
Product of the 2nd & 6th prime numbers= 3 x 13 = 39
Sum of the 1st & 12th prime numbers = 2 + 37 = 39
Sum of 10th odd & 10th even numbers = 19 + 20 = 39
Sum of numbers 4 through 9 = 4 + 5 + 6 + 7 + 8 + 9 = 39
Sum of the 6th, 7th, & 8th odd numbers = 11 + 13 + 15 = 39
40
Can be partitioned 31185 ways.
2x2x2x5
The 4th octagonal number.
Pentagonal Pyramidal Number
The 7th abundant number
42
Can be partitioned 44583 ways.
2x3x7
The 4th catalan number.
The 8th abundant number.
43
Can be partitioned 53174 ways.
prime
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44
Can be partitioned 63261 ways.
2x2x11
The 4th octahedral number.
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45
Can be partitioned 75175 ways.
Prime Divisors: 3x3x5
The 5th hexagonal number.
The 5th super catalan number
46
Can be partitioned 89134 ways.
Prime Divisors: 2x23
The 4th nonagonal number.
The 6th centered triangular number.
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47
Can be partitioned ways.
Prime
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48
Can be partitioned ways.
Prime Divisors: 2x2x2x2x3
The 9th abundant number.
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49
Can be partitioned ways.
Prime Divisors: 7x7
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50
Can be partitioned ways.
2x5x5
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The 25th even number = 50
Product of the 1st even & 13th odd numbers = 2 x 25 = 50
Product of the 3rd odd & 5th even numbers = 5 x 10 = 50
Sum of the 3rd cube and 9th prime numbers 27 + 23 = 50
Sum of the 6th and 12th prime numbers 13 + 37 = 50
Sum of the 8th and 11th prime numbers 19 + 31 = 50
Sum of the 4th and 14th prime numbers 7 + 43 = 50
Sum of the 1st three abundant numbers 12 + 18 + 20 = 50
sum of the squares of the Pythagorean 3-4-5 triangle= 9 + 16 + 25 = 50
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