231261904 has 20 divisors (see below), whose sum is σ = 453470976. Its totient is φ = 114237152.

The previous prime is 231261859. The next prime is 231261929. The reversal of 231261904 is 409162132.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85744 + ... + 88399.

Almost surely, 2^231261904 is an apocalyptic number.

It is an amenable number.

231261904 is a deficient number, since it is larger than the sum of its proper divisors (222209072).

231261904 is a wasteful number, since it uses less digits than its factorization.

231261904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174234 (or 174228 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 231261904 is about 15207.2977218176. The cubic root of 231261904 is about 613.8110450686.

The spelling of 231261904 in words is "two hundred thirty-one million, two hundred sixty-one thousand, nine hundred four".