31913237851242 has 16 divisors (see below), whose sum is σ = 69628882584672. Its totient is φ = 9670678136720.

The previous prime is 31913237851207. The next prime is 31913237851267. The reversal of 31913237851242 is 24215873231913.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241766953353 + ... + 241766953484.

It is an arithmetic number, because the mean of its divisors is an integer number (4351805161542).

Almost surely, 2^{31913237851242} is an apocalyptic number.

31913237851242 is an abundant number, since it is smaller than the sum of its proper divisors (37715644733430).

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

31913237851242 is a wasteful number, since it uses less digits than its factorization.

31913237851242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483533906853.

The product of its digits is 2177280, while the sum is 51.

The spelling of 31913237851242 in words is "thirty-one trillion, nine hundred thirteen billion, two hundred thirty-seven million, eight hundred fifty-one thousand, two hundred forty-two".