231664072 has 32 divisors (see below), whose sum is σ = 440294400. Its totient is φ = 114264000.

The previous prime is 231664057. The next prime is 231664087. The reversal of 231664072 is 270466132.

231664072 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (231664057) and next prime (231664087).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200697 + ... + 201847.

It is an arithmetic number, because the mean of its divisors is an integer number (13759200).

Almost surely, 2^231664072 is an apocalyptic number.

It is an amenable number.

231664072 is a deficient number, since it is larger than the sum of its proper divisors (208630328).

231664072 is a wasteful number, since it uses less digits than its factorization.

231664072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1477 (or 1473 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 231664072 is about 15220.5148401754. The cubic root of 231664072 is about 614.1666479575.

The spelling of 231664072 in words is "two hundred thirty-one million, six hundred sixty-four thousand, seventy-two".