31725313472 has 28 divisors (see below), whose sum is σ = 62964081336. Its totient is φ = 15860348160.

The previous prime is 31725313469. The next prime is 31725313481. The reversal of 31725313472 is 27431352713.

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 3 ways as a sum of consecutive naturals, for example, 459998 + ... + 524450.

Almost surely, 2^31725313472 is an apocalyptic number.

31725313472 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31725313472 is a deficient number, since it is larger than the sum of its proper divisors (31238767864).

31725313472 is an equidigital number, since it uses as much as digits as its factorization.

31725313472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72156 (or 72146 counting only the distinct ones).

The product of its digits is 105840, while the sum is 38.

The spelling of 31725313472 in words is "thirty-one billion, seven hundred twenty-five million, three hundred thirteen thousand, four hundred seventy-two".