31985131596 has 24 divisors (see below), whose sum is σ = 81416698944. Its totient is φ = 9692464080.

The previous prime is 31985131561. The next prime is 31985131613. The reversal of 31985131596 is 69513158913.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121155670 + ... + 121155933.

It is an arithmetic number, because the mean of its divisors is an integer number (3392362456).

Almost surely, 2^31985131596 is an apocalyptic number.

It is an amenable number.

31985131596 is an abundant number, since it is smaller than the sum of its proper divisors (49431567348).

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

31985131596 is a wasteful number, since it uses less digits than its factorization.

31985131596 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242311621 (or 242311619 counting only the distinct ones).

The product of its digits is 874800, while the sum is 51.

The spelling of 31985131596 in words is "thirty-one billion, nine hundred eighty-five million, one hundred thirty-one thousand, five hundred ninety-six".