31215355431132 has 24 divisors (see below), whose sum is σ = 72836010663696. Its totient is φ = 10405092573568.

The previous prime is 31215355431119. The next prime is 31215355431191. The reversal of 31215355431132 is 23113455351213.

It is a happy number.

It is a congruent number.

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, 2140528 + ... + 8186120.

It is an arithmetic number, because the mean of its divisors is an integer number (3034833777654).

Almost surely, 2^{31215355431132} is an apocalyptic number.

It is an amenable number.

31215355431132 is an abundant number, since it is smaller than the sum of its proper divisors (41620655232564).

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

31215355431132 is a wasteful number, since it uses less digits than its factorization.

31215355431132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6475877 (or 6475875 counting only the distinct ones).

The product of its digits is 162000, while the sum is 39.

The spelling of 31215355431132 in words is "thirty-one trillion, two hundred fifteen billion, three hundred fifty-five million, four hundred thirty-one thousand, one hundred thirty-two".