231872 has 14 divisors (see below), whose sum is σ = 460248. Its totient is φ = 115904.

The previous prime is 231871. The next prime is 231877. The reversal of 231872 is 278132.

231872 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1748 + ... + 1875.

2²³¹⁸⁷² is an apocalyptic number.

It is an amenable number.

231872 is a deficient number, since it is larger than the sum of its proper divisors (228376).

231872 is an equidigital number, since it uses as much as digits as its factorization.

231872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3635 (or 3625 counting only the distinct ones).

The product of its digits is 672, while the sum is 23.

The square root of 231872 is about 481.5308920516. The cubic root of 231872 is about 61.4350339592.

The spelling of 231872 in words is "two hundred thirty-one thousand, eight hundred seventy-two".