31749992272 has 40 divisors (see below), whose sum is σ = 61747534016. Its totient is φ = 15815264256.

The previous prime is 31749992233. The next prime is 31749992303. The reversal of 31749992272 is 27229994713.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5007088 + ... + 5013424.

Almost surely, 2^31749992272 is an apocalyptic number.

It is an amenable number.

31749992272 is a deficient number, since it is larger than the sum of its proper divisors (29997541744).

31749992272 is a wasteful number, since it uses less digits than its factorization.

31749992272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7475 (or 7469 counting only the distinct ones).

The product of its digits is 3429216, while the sum is 55.

The spelling of 31749992272 in words is "thirty-one billion, seven hundred forty-nine million, nine hundred ninety-two thousand, two hundred seventy-two".