31521652460 has 24 divisors (see below), whose sum is σ = 69679443120. Its totient is φ = 11945047104.

The previous prime is 31521652453. The next prime is 31521652471. The reversal of 31521652460 is 6425612513.

It is a super-2 number, since 2×31521652460² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31521652460.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41475479 + ... + 41476238.

It is an arithmetic number, because the mean of its divisors is an integer number (2903310130).

Almost surely, 2^31521652460 is an apocalyptic number.

It is an amenable number.

31521652460 is an abundant number, since it is smaller than the sum of its proper divisors (38157790660).

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

31521652460 is a wasteful number, since it uses less digits than its factorization.

31521652460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82951745 (or 82951743 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 35.

The spelling of 31521652460 in words is "thirty-one billion, five hundred twenty-one million, six hundred fifty-two thousand, four hundred sixty".