31013143208 has 16 divisors (see below), whose sum is σ = 58520025780. Its totient is φ = 15407803008.

The previous prime is 31013143201. The next prime is 31013143211. The reversal of 31013143208 is 80234131013.

It can be written as a sum of positive squares in 2 ways, for example, as 30702749284 + 310393924 = 175222^2 + 17618^2 .

It is not an unprimeable number, because it can be changed into a prime (31013143201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12344741 + ... + 12347252.

Almost surely, 2^31013143208 is an apocalyptic number.

It is an amenable number.

31013143208 is a deficient number, since it is larger than the sum of its proper divisors (27506882572).

31013143208 is a wasteful number, since it uses less digits than its factorization.

31013143208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24692156 (or 24692152 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The spelling of 31013143208 in words is "thirty-one billion, thirteen million, one hundred forty-three thousand, two hundred eight".