51331022112520 has 32 divisors (see below), whose sum is σ = 118616280831000. Its totient is φ = 19977478875648.

The previous prime is 51331022112499. The next prime is 51331022112551. The reversal of 51331022112520 is 2521122013315.

It can be written as a sum of positive squares in 4 ways, for example, as 43784980148484 + 7546041964036 = 6617022^2 + 2747006^2 .

It is a super-2 number, since 2×51331022112520² (a number of 28 digits) contains 22 as substring.

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, 17341560045 + ... + 17341563004.

Almost surely, 2^{51331022112520} is an apocalyptic number.

It is an amenable number.

51331022112520 is an abundant number, since it is smaller than the sum of its proper divisors (67285258718480).

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

51331022112520 is a wasteful number, since it uses less digits than its factorization.

51331022112520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34683123097 (or 34683123093 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

Adding to 51331022112520 its reverse (2521122013315), we get a palindrome (53852144125835).

The spelling of 51331022112520 in words is "fifty-one trillion, three hundred thirty-one billion, twenty-two million, one hundred twelve thousand, five hundred twenty".