31513704252 has 24 divisors (see below), whose sum is σ = 73644601296. Its totient is φ = 10488478848.

The previous prime is 31513704251. The next prime is 31513704259. The reversal of 31513704252 is 25240731513.

It is a super-2 number, since 2×31513704252² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31513704251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2002993 + ... + 2018664.

It is an arithmetic number, because the mean of its divisors is an integer number (3068525054).

Almost surely, 2^31513704252 is an apocalyptic number.

It is an amenable number.

31513704252 is an abundant number, since it is smaller than the sum of its proper divisors (42130897044).

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

31513704252 is a wasteful number, since it uses less digits than its factorization.

31513704252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4022317 (or 4022315 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 33.

The spelling of 31513704252 in words is "thirty-one billion, five hundred thirteen million, seven hundred four thousand, two hundred fifty-two".