231 (number) explained

Number:231

231 (two hundred [and] thirty-one) is the natural number following 230 and preceding 232.

Two hundred [and] thirty-one 231 = 3·7·11, sphenic number, triangular number, doubly triangular number, hexagonal number, octahedral number,[1] centered octahedral number,[2] the number of integer partitions of 16, Mertens function returns 0,[3] and is the number of cubic inches in a U.S. liquid gallon.

Notes and References

  1. Web site: Sloane's A005900 : Octahedral numbers. The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. 2016-05-24.
  2. Web site: Sloane's A001845 : Centered octahedral numbers. The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. 2016-05-24.
  3. Web site: Sloane's A028442 : Numbers n such that Mertens' function is zero. The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. 2016-05-24.

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "231 (number)".

Except where otherwise indicated, Everything.Explained.Today is © Copyright 2009-2024, A B Cryer, All Rights Reserved. Cookie policy.