31310217328 has 40 divisors (see below), whose sum is σ = 65578490208. Its totient is φ = 14395898112.

The previous prime is 31310217283. The next prime is 31310217353. The reversal of 31310217328 is 82371201313.

It is a self number, because there is not a number n which added to its sum of digits gives 31310217328.

It is a congruent number.

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, 231475 + ... + 340882.

Almost surely, 2^31310217328 is an apocalyptic number.

It is an amenable number.

31310217328 is an abundant number, since it is smaller than the sum of its proper divisors (34268272880).

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

31310217328 is a wasteful number, since it uses less digits than its factorization.

31310217328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572641 (or 572635 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The spelling of 31310217328 in words is "thirty-one billion, three hundred ten million, two hundred seventeen thousand, three hundred twenty-eight".