215131002520 has 64 divisors (see below), whose sum is σ = 560985523200. Its totient is φ = 72720332160.

The previous prime is 215131002511. The next prime is 215131002547. The reversal of 215131002520 is 25200131512.

It is a junction number, because it is equal to n+sod(n) for n = 215131002491 and 215131002500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5390860 + ... + 5430619.

It is an arithmetic number, because the mean of its divisors is an integer number (8765398800).

Almost surely, 2^215131002520 is an apocalyptic number.

215131002520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215131002520 is an abundant number, since it is smaller than the sum of its proper divisors (345854520680).

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

215131002520 is a wasteful number, since it uses less digits than its factorization.

215131002520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10821568 (or 10821564 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The spelling of 215131002520 in words is "two hundred fifteen billion, one hundred thirty-one million, two thousand, five hundred twenty".