31172073288 has 32 divisors (see below), whose sum is σ = 78165641760. Its totient is φ = 10359296640.

The previous prime is 31172073271. The next prime is 31172073337. The reversal of 31172073288 is 88237027113.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1954045 + ... + 1969932.

It is an arithmetic number, because the mean of its divisors is an integer number (2442676305).

Almost surely, 2^31172073288 is an apocalyptic number.

It is an amenable number.

31172073288 is an abundant number, since it is smaller than the sum of its proper divisors (46993568472).

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

31172073288 is a wasteful number, since it uses less digits than its factorization.

31172073288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3924317 (or 3924313 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 42.

The spelling of 31172073288 in words is "thirty-one billion, one hundred seventy-two million, seventy-three thousand, two hundred eighty-eight".