31919813352 has 48 divisors (see below), whose sum is σ = 98799423840. Its totient is φ = 9119946528.

The previous prime is 31919813347. The next prime is 31919813413. The reversal of 31919813352 is 25331891913.

It is a junction number, because it is equal to n+sod(n) for n = 31919813298 and 31919813307.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31665978 + ... + 31666985.

It is an arithmetic number, because the mean of its divisors is an integer number (2058321330).

Almost surely, 2^31919813352 is an apocalyptic number.

It is an amenable number.

31919813352 is an abundant number, since it is smaller than the sum of its proper divisors (66879610488).

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

31919813352 is a wasteful number, since it uses less digits than its factorization.

31919813352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63332982 (or 63332975 counting only the distinct ones).

The product of its digits is 174960, while the sum is 45.

The spelling of 31919813352 in words is "thirty-one billion, nine hundred nineteen million, eight hundred thirteen thousand, three hundred fifty-two".