31375172772 has 30 divisors (see below), whose sum is σ = 82020900038. Its totient is φ = 10458390816.

The previous prime is 31375172671. The next prime is 31375172789. The reversal of 31375172772 is 27727157313.

31375172772 is a `hidden beast` number, since 3 + 1 + 375 + 1 + 7 + 277 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 17589125376 + 13786047396 = 132624^2 + 117414^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 48418153 + ... + 48418800.

Almost surely, 2^31375172772 is an apocalyptic number.

It is an amenable number.

31375172772 is an abundant number, since it is smaller than the sum of its proper divisors (50645727266).

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

31375172772 is a wasteful number, since it uses less digits than its factorization.

31375172772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96836969 (or 96836958 counting only the distinct ones).

The product of its digits is 432180, while the sum is 45.

The spelling of 31375172772 in words is "thirty-one billion, three hundred seventy-five million, one hundred seventy-two thousand, seven hundred seventy-two".