31351863777252 has 12 divisors (see below), whose sum is σ = 73154348813616. Its totient is φ = 10450621259080.

The previous prime is 31351863777229. The next prime is 31351863777253. The reversal of 31351863777252 is 25277736815313.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (31351863777253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1306327657374 + ... + 1306327657397.

It is an arithmetic number, because the mean of its divisors is an integer number (6096195734468).

Almost surely, 2^{31351863777252} is an apocalyptic number.

It is an amenable number.

31351863777252 is an abundant number, since it is smaller than the sum of its proper divisors (41802485036364).

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

31351863777252 is a wasteful number, since it uses less digits than its factorization.

31351863777252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2612655314778 (or 2612655314776 counting only the distinct ones).

The product of its digits is 44452800, while the sum is 60.

The spelling of 31351863777252 in words is "thirty-one trillion, three hundred fifty-one billion, eight hundred sixty-three million, seven hundred seventy-seven thousand, two hundred fifty-two".