31197945984 has 32 divisors (see below), whose sum is σ = 82869545040. Its totient is φ = 10399315200.

The previous prime is 31197945971. The next prime is 31197945997. The reversal of 31197945984 is 48954979113.

It is an interprime number because it is at equal distance from previous prime (31197945971) and next prime (31197945997).

It is a tau number, because it is divible by the number of its divisors (32).

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 3 ways as a sum of consecutive naturals, for example, 40621942 + ... + 40622709.

Almost surely, 2^31197945984 is an apocalyptic number.

It is an amenable number.

31197945984 is an abundant number, since it is smaller than the sum of its proper divisors (51671599056).

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

31197945984 is an equidigital number, since it uses as much as digits as its factorization.

31197945984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81244668 (or 81244656 counting only the distinct ones).

The product of its digits is 9797760, while the sum is 60.

The spelling of 31197945984 in words is "thirty-one billion, one hundred ninety-seven million, nine hundred forty-five thousand, nine hundred eighty-four".