31231312130232 has 72 divisors (see below), whose sum is σ = 86597638756200. Its totient is φ = 10168334138592.

The previous prime is 31231312130167. The next prime is 31231312130269. The reversal of 31231312130232 is 23203121313213.

31231312130232 is a `hidden beast` number, since 3 + 1 + 2 + 313 + 12 + 1 + 302 + 32 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a junction number, because it is equal to n+sod(n) for n = 31231312130196 and 31231312130205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 117164932 + ... + 117431187.

It is an arithmetic number, because the mean of its divisors is an integer number (1202744982725).

Almost surely, 2^{31231312130232} is an apocalyptic number.

It is an amenable number.

31231312130232 is an abundant number, since it is smaller than the sum of its proper divisors (55366326625968).

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

31231312130232 is a wasteful number, since it uses less digits than its factorization.

31231312130232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234596217 (or 234596167 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

Adding to 31231312130232 its reverse (23203121313213), we get a palindrome (54434433443445).

The spelling of 31231312130232 in words is "thirty-one trillion, two hundred thirty-one billion, three hundred twelve million, one hundred thirty thousand, two hundred thirty-two".