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The Number 422: Properties and Meanings
Prime Factors of 422=2x211.The maximal number of regions into which a plane can be divided by 21 circles=422.
The Year 422 AD
In the year 422 AD ...0 - 500 | 501 - 1000 | 1001 - 1500 | 1501 - 2000 | 2001 - 2500
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