31542048520 has 16 divisors (see below), whose sum is σ = 70969609260. Its totient is φ = 12616819392.

The previous prime is 31542048511. The next prime is 31542048521. The reversal of 31542048520 is 2584024513.

It can be written as a sum of positive squares in 2 ways, for example, as 29051838916 + 2490209604 = 170446^2 + 49902^2 .

It is not an unprimeable number, because it can be changed into a prime (31542048521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 394275567 + ... + 394275646.

Almost surely, 2^31542048520 is an apocalyptic number.

It is an amenable number.

31542048520 is an abundant number, since it is smaller than the sum of its proper divisors (39427560740).

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

31542048520 is a wasteful number, since it uses less digits than its factorization.

31542048520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788551224 (or 788551220 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 34.

The spelling of 31542048520 in words is "thirty-one billion, five hundred forty-two million, forty-eight thousand, five hundred twenty".