31578452532 has 48 divisors (see below), whose sum is σ = 89312798400. Its totient is φ = 9569227680.

The previous prime is 31578452491. The next prime is 31578452539. The reversal of 31578452532 is 23525487513.

31578452532 is a `hidden beast` number, since 3 + 1 + 5 + 78 + 45 + 2 + 532 = 666.

It is a super-3 number, since 3×31578452532³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31578452539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13289407 + ... + 13291782.

It is an arithmetic number, because the mean of its divisors is an integer number (1860683300).

Almost surely, 2^31578452532 is an apocalyptic number.

It is an amenable number.

31578452532 is an abundant number, since it is smaller than the sum of its proper divisors (57734345868).

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

31578452532 is a wasteful number, since it uses less digits than its factorization.

31578452532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26581213 (or 26581205 counting only the distinct ones).

The product of its digits is 1008000, while the sum is 45.

The spelling of 31578452532 in words is "thirty-one billion, five hundred seventy-eight million, four hundred fifty-two thousand, five hundred thirty-two".