231 (number)


231 is the natural number following 230 and preceding 232.

In mathematics

Two hundred thirty-one 231 = 3·7·11, sphenic number, triangular number, hexagonal number, octahedral number, centered octahedral number, the number of integer partitions of 16, Mertens function returns 0, and is the number of cubic inches in a U.S. liquid gallon.

In other fields

231 is: