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The Number 331: Properties and Meanings

331 is a Prime Number.

331 is a Centered Pentagonal Number.

331 is a Centered Hexagonal Number.

331 is a Centered 22-gonal Number.

331 is a Centered 33-gonal Number.

Robert Franek wrote a book titled, "The Best 331 Colleges".


The Year 331 AD

In the year 331 AD the battle of Achadh Leithdheirg took place in Fearnmhagh, Ireland.

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