31018037172 has 48 divisors (see below), whose sum is σ = 74327894592. Its totient is φ = 10061694720.

The previous prime is 31018037161. The next prime is 31018037189. The reversal of 31018037172 is 27173081013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115923 + ... + 274725.

It is an arithmetic number, because the mean of its divisors is an integer number (1548497804).

Almost surely, 2^31018037172 is an apocalyptic number.

It is an amenable number.

31018037172 is an abundant number, since it is smaller than the sum of its proper divisors (43309857420).

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

31018037172 is a wasteful number, since it uses less digits than its factorization.

31018037172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159248 (or 159246 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 33.

The spelling of 31018037172 in words is "thirty-one billion, eighteen million, thirty-seven thousand, one hundred seventy-two".