231540304 has 20 divisors (see below), whose sum is σ = 452145664. Its totient is φ = 114857568.

The previous prime is 231540299. The next prime is 231540313. The reversal of 231540304 is 403045132.

It is a super-2 number, since 2×231540304² = 107221824752824832, which contains 22 as substring.

It is a congruent number.

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, 54942 + ... + 59005.

Almost surely, 2^231540304 is an apocalyptic number.

It is an amenable number.

231540304 is a deficient number, since it is larger than the sum of its proper divisors (220605360).

231540304 is a wasteful number, since it uses less digits than its factorization.

231540304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114082 (or 114076 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 231540304 is about 15216.4484686802. The cubic root of 231540304 is about 614.0572543313.

Adding to 231540304 its reverse (403045132), we get a palindrome (634585436).

The spelling of 231540304 in words is "two hundred thirty-one million, five hundred forty thousand, three hundred four".