31525057512 has 96 divisors (see below), whose sum is σ = 92075529000. Its totient is φ = 9686573568.

The previous prime is 31525057493. The next prime is 31525057541. The reversal of 31525057512 is 21575052513.

31525057512 is a `hidden beast` number, since 31 + 5 + 2 + 50 + 575 + 1 + 2 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 31331124036 + 193933476 = 177006^2 + 13926^2 .

It is a super-2 number, since 2×31525057512² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 663114 + ... + 709062.

Almost surely, 2^31525057512 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 31525057512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46037764500).

31525057512 is an abundant number, since it is smaller than the sum of its proper divisors (60550471488).

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

31525057512 is a wasteful number, since it uses less digits than its factorization.

31525057512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46707 (or 46700 counting only the distinct ones).

The product of its (nonzero) digits is 52500, while the sum is 36.

The spelling of 31525057512 in words is "thirty-one billion, five hundred twenty-five million, fifty-seven thousand, five hundred twelve".