51909522013 has 12 divisors (see below), whose sum is σ = 53261413920. Its totient is φ = 50577375296.

The previous prime is 51909521971. The next prime is 51909522079. The reversal of 51909522013 is 31022590915.

It is not a de Polignac number, because 51909522013 - 2²⁵ = 51875967581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51909522113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 718920 + ... + 787822.

It is an arithmetic number, because the mean of its divisors is an integer number (4438451160).

Almost surely, 2^51909522013 is an apocalyptic number.

It is an amenable number.

51909522013 is a deficient number, since it is larger than the sum of its proper divisors (1351891907).

51909522013 is an equidigital number, since it uses as much as digits as its factorization.

51909522013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69188 (or 69075 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 37.

The spelling of 51909522013 in words is "fifty-one billion, nine hundred nine million, five hundred twenty-two thousand, thirteen".