231552172 has 12 divisors (see below), whose sum is σ = 429052680. Its totient is φ = 108965696.

The previous prime is 231552161. The next prime is 231552193. The reversal of 231552172 is 271255132.

It is a self number, because there is not a number n which added to its sum of digits gives 231552172.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1702522 + ... + 1702657.

It is an arithmetic number, because the mean of its divisors is an integer number (35754390).

Almost surely, 2^231552172 is an apocalyptic number.

It is an amenable number.

231552172 is a deficient number, since it is larger than the sum of its proper divisors (197500508).

231552172 is a wasteful number, since it uses less digits than its factorization.

231552172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3405200 (or 3405198 counting only the distinct ones).

The product of its digits is 4200, while the sum is 28.

The square root of 231552172 is about 15216.8384364164. The cubic root of 231552172 is about 614.0677456754.

The spelling of 231552172 in words is "two hundred thirty-one million, five hundred fifty-two thousand, one hundred seventy-two".