231133431320 has 64 divisors (see below), whose sum is σ = 567449245440. Its totient is φ = 84030486400.

The previous prime is 231133431317. The next prime is 231133431407. The reversal of 231133431320 is 23134331132.

It is a self number, because there is not a number n which added to its sum of digits gives 231133431320.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2089319 + ... + 2197161.

It is an arithmetic number, because the mean of its divisors is an integer number (8866394460).

Almost surely, 2^231133431320 is an apocalyptic number.

231133431320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231133431320 is an abundant number, since it is smaller than the sum of its proper divisors (336315814120).

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

231133431320 is a wasteful number, since it uses less digits than its factorization.

231133431320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112736 (or 112732 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 231133431320 its reverse (23134331132), we get a palindrome (254267762452).

The spelling of 231133431320 in words is "two hundred thirty-one billion, one hundred thirty-three million, four hundred thirty-one thousand, three hundred twenty".