31018843743172 has 12 divisors (see below), whose sum is σ = 54283716081196. Its totient is φ = 15509210577120.

The previous prime is 31018843743143. The next prime is 31018843743241. The reversal of 31018843743172 is 27134734881013.

It can be written as a sum of positive squares in 2 ways, for example, as 11191540581376 + 19827303161796 = 3345376^2 + 4452786^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52493079 + ... + 53080702.

Almost surely, 2^{31018843743172} is an apocalyptic number.

It is an amenable number.

31018843743172 is a deficient number, since it is larger than the sum of its proper divisors (23264872338024).

31018843743172 is a wasteful number, since it uses less digits than its factorization.

31018843743172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105647238 (or 105647236 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 52.

The spelling of 31018843743172 in words is "thirty-one trillion, eighteen billion, eight hundred forty-three million, seven hundred forty-three thousand, one hundred seventy-two".