31542956172 has 432 divisors, whose sum is σ = 107912080640. Its totient is φ = 7823651328.

The previous prime is 31542956149. The next prime is 31542956183. The reversal of 31542956172 is 27165924513.

31542956172 is a `hidden beast` number, since 3 + 1 + 5 + 4 + 29 + 5 + 617 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 230240488 + ... + 230240624.

Almost surely, 2^31542956172 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31542956172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53956040320).

31542956172 is an abundant number, since it is smaller than the sum of its proper divisors (76369124468).

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

31542956172 is a wasteful number, since it uses less digits than its factorization.

31542956172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332 (or 181 counting only the distinct ones).

The product of its digits is 453600, while the sum is 45.

The spelling of 31542956172 in words is "thirty-one billion, five hundred forty-two million, nine hundred fifty-six thousand, one hundred seventy-two".