51310572509 has 12 divisors (see below), whose sum is σ = 59712992064. Its totient is φ = 43961934744.

The previous prime is 51310572499. The next prime is 51310572517. The reversal of 51310572509 is 90527501315.

It is not a de Polignac number, because 51310572509 - 2²⁰ = 51309523933 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 (51310572589) 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, 102947 + ... + 336480.

It is an arithmetic number, because the mean of its divisors is an integer number (4976082672).

Almost surely, 2^51310572509 is an apocalyptic number.

It is an amenable number.

51310572509 is a deficient number, since it is larger than the sum of its proper divisors (8402419555).

51310572509 is a wasteful number, since it uses less digits than its factorization.

51310572509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441824 (or 441817 counting only the distinct ones).

The product of its (nonzero) digits is 47250, while the sum is 38.

The spelling of 51310572509 in words is "fifty-one billion, three hundred ten million, five hundred seventy-two thousand, five hundred nine".