The Number 505: Properties and MeaningsPrime Factors of 505=5x101.
505 is a 13-gonal Number.
505 is a 52-gonal Number.
505 is a Centered 14-gonal Number.
505 is a Centered 18-gonal Number.
505 is a Centered 24-gonal Number.
The Year 505 ADIn the year 505 AD Rome's Colosseum suffered damage from an earthquake as it did in 422 AD.
In the year 505 AD the Byzantine emperor Anastasius I agreed to pay his share of defending the Caucasian Gates against invasions from east Asia and made peace with Persia.