231999957072 has 60 divisors (see below), whose sum is σ = 699222098484. Its totient is φ = 71384601600.

The previous prime is 231999957061. The next prime is 231999957097. The reversal of 231999957072 is 270759999132.

It can be written as a sum of positive squares in 2 ways, for example, as 29089349136 + 202910607936 = 170556^2 + 450456^2 .

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 11 ways as a sum of consecutive naturals, for example, 61963929 + ... + 61967672.

Almost surely, 2^231999957072 is an apocalyptic number.

It is an amenable number.

231999957072 is an abundant number, since it is smaller than the sum of its proper divisors (467222141412).

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

231999957072 is a wasteful number, since it uses less digits than its factorization.

231999957072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123931628 (or 123931619 counting only the distinct ones).

The product of its (nonzero) digits is 19289340, while the sum is 63.

The spelling of 231999957072 in words is "two hundred thirty-one billion, nine hundred ninety-nine million, nine hundred fifty-seven thousand, seventy-two".