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The Number 231231 is a Triangular Number. 231 is a Hexagonal Number. 231 is an Octahedral Number. 231 is a 17-gonal Number. 231 is a 78-gonal Number. 231 is a Centered 23-gonal Number. 231 is the 22nd number which is the Product of 3 distinct primes. 231 is the triangle of 21 which is the triangle of 6 which is the triangle of 3 which is the triangle of 2. Thus, 231 , is a triangle of a triangle of a triangle. 16 can be Partitioned in 231 ways. The 231 two-letter combinations of the 22 letters of the Hebrew Alphabet refered to as the 231 gates of Sefer Yetzirah.
Two hundred thirty-one is the exact number of cubic inches in a U.S. liquid gallon.
The Year 231 ADIn the year 231 AD Origen, disciple of Ammonius Saccas, founder of Neoplatonism , was exiled in Caesarea.
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