231551536256 has 32 divisors (see below), whose sum is σ = 461992117980. Its totient is φ = 115600573440.

The previous prime is 231551536219. The next prime is 231551536291. The reversal of 231551536256 is 652635155132.

It can be written as a sum of positive squares in 2 ways, for example, as 225625000000 + 5926536256 = 475000^2 + 76984^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×231551536256² (a number of 24 digits) contains 22 as substring.

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, 1283771 + ... + 1452986.

Almost surely, 2^231551536256 is an apocalyptic number.

It is an amenable number.

231551536256 is a deficient number, since it is larger than the sum of its proper divisors (230440581724).

231551536256 is an equidigital number, since it uses as much as digits as its factorization.

231551536256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2737432 (or 2737420 counting only the distinct ones).

The product of its digits is 810000, while the sum is 44.

The spelling of 231551536256 in words is "two hundred thirty-one billion, five hundred fifty-one million, five hundred thirty-six thousand, two hundred fifty-six".