31631313982 has 4 divisors (see below), whose sum is σ = 47446970976. Its totient is φ = 15815656990.

The previous prime is 31631313971. The next prime is 31631314003. The reversal of 31631313982 is 28931313613.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 28931313613 = 127 ⋅227805619.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7907828494 + ... + 7907828497.

It is an arithmetic number, because the mean of its divisors is an integer number (11861742744).

Almost surely, 2^31631313982 is an apocalyptic number.

31631313982 is a deficient number, since it is larger than the sum of its proper divisors (15815656994).

31631313982 is a wasteful number, since it uses less digits than its factorization.

31631313982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15815656993.

The product of its digits is 69984, while the sum is 40.

The spelling of 31631313982 in words is "thirty-one billion, six hundred thirty-one million, three hundred thirteen thousand, nine hundred eighty-two".