231387564 has 24 divisors (see below), whose sum is σ = 540906688. Its totient is φ = 76986000.

The previous prime is 231387553. The next prime is 231387577. The reversal of 231387564 is 465783132.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

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, 11062 + ... + 24189.

Almost surely, 2^231387564 is an apocalyptic number.

It is an amenable number.

231387564 is an abundant number, since it is smaller than the sum of its proper divisors (309519124).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231387564 is a wasteful number, since it uses less digits than its factorization.

231387564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35805 (or 35803 counting only the distinct ones).

The product of its digits is 120960, while the sum is 39.

The square root of 231387564 is about 15211.4287297413. The cubic root of 231387564 is about 613.9221997502.

The spelling of 231387564 in words is "two hundred thirty-one million, three hundred eighty-seven thousand, five hundred sixty-four".