31311020103200 has 72 divisors (see below), whose sum is σ = 76443243420852. Its totient is φ = 12523553464320.

The previous prime is 31311020103173. The next prime is 31311020103343. The reversal of 31311020103200 is 230102011313.

It can be written as a sum of positive squares in 6 ways, for example, as 19052142495376 + 12258877607824 = 4364876^2 + 3501268^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10461692 + ... + 13117508.

Almost surely, 2^{31311020103200} is an apocalyptic number.

It is an amenable number.

31311020103200 is an abundant number, since it is smaller than the sum of its proper divisors (45132223317652).

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

31311020103200 is a wasteful number, since it uses less digits than its factorization.

31311020103200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2670574 (or 2670561 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 31311020103200 its reverse (230102011313), we get a palindrome (31541122114513).

The spelling of 31311020103200 in words is "thirty-one trillion, three hundred eleven billion, twenty million, one hundred three thousand, two hundred".