31547059172 has 6 divisors (see below), whose sum is σ = 55207353558. Its totient is φ = 15773529584.

The previous prime is 31547059169. The next prime is 31547059199. The reversal of 31547059172 is 27195074513.

It can be written as a sum of positive squares in only one way, i.e., 29014352896 + 2532706276 = 170336^2 + 50326^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3943382393 + ... + 3943382400.

It is an arithmetic number, because the mean of its divisors is an integer number (9201225593).

Almost surely, 2^31547059172 is an apocalyptic number.

It is an amenable number.

31547059172 is a deficient number, since it is larger than the sum of its proper divisors (23660294386).

31547059172 is a wasteful number, since it uses less digits than its factorization.

31547059172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7886764797 (or 7886764795 counting only the distinct ones).

The product of its (nonzero) digits is 264600, while the sum is 44.

The spelling of 31547059172 in words is "thirty-one billion, five hundred forty-seven million, fifty-nine thousand, one hundred seventy-two".