31297981452 has 24 divisors (see below), whose sum is σ = 73037932800. Its totient is φ = 10431330576.

The previous prime is 31297981447. The next prime is 31297981471. The reversal of 31297981452 is 25418979213.

It is a junction number, because it is equal to n+sod(n) for n = 31297981395 and 31297981404.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65752 + ... + 258687.

It is an arithmetic number, because the mean of its divisors is an integer number (3043247200).

Almost surely, 2^31297981452 is an apocalyptic number.

It is an amenable number.

31297981452 is an abundant number, since it is smaller than the sum of its proper divisors (41739951348).

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

31297981452 is a wasteful number, since it uses less digits than its factorization.

31297981452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332485 (or 332483 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 51.

The spelling of 31297981452 in words is "thirty-one billion, two hundred ninety-seven million, nine hundred eighty-one thousand, four hundred fifty-two".