231631881536 has 56 divisors (see below), whose sum is σ = 501485769696. Its totient is φ = 105275589120.

The previous prime is 231631881493. The next prime is 231631881577. The reversal of 231631881536 is 635188136132.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12012575 + ... + 12031841.

Almost surely, 2^231631881536 is an apocalyptic number.

It is an amenable number.

231631881536 is an abundant number, since it is smaller than the sum of its proper divisors (269853888160).

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

231631881536 is a wasteful number, since it uses less digits than its factorization.

231631881536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36367 (or 36357 counting only the distinct ones).

The product of its digits is 622080, while the sum is 47.

The spelling of 231631881536 in words is "two hundred thirty-one billion, six hundred thirty-one million, eight hundred eighty-one thousand, five hundred thirty-six".