31152235040 has 48 divisors (see below), whose sum is σ = 73721489688. Its totient is φ = 12439842816.

The previous prime is 31152235033. The next prime is 31152235043. The reversal of 31152235040 is 4053225113.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 31143778576 + 8456464 = 176476^2 + 2908^2 .

It is not an unprimeable number, because it can be changed into a prime (31152235043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69287 + ... + 259046.

Almost surely, 2^31152235040 is an apocalyptic number.

It is an amenable number.

31152235040 is an abundant number, since it is smaller than the sum of its proper divisors (42569254648).

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

31152235040 is a wasteful number, since it uses less digits than its factorization.

31152235040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328941 (or 328933 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The spelling of 31152235040 in words is "thirty-one billion, one hundred fifty-two million, two hundred thirty-five thousand, forty".