51013325520 has 120 divisors (see below), whose sum is σ = 171383932512. Its totient is φ = 13598457600.

The previous prime is 51013325453. The next prime is 51013325533. The reversal of 51013325520 is 2552331015.

It is a happy number.

51013325520 is a `hidden beast` number, since 5 + 1 + 0 + 133 + 2 + 5 + 520 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2156155 + ... + 2179685.

Almost surely, 2^51013325520 is an apocalyptic number.

It is an amenable number.

51013325520 is an abundant number, since it is smaller than the sum of its proper divisors (120370606992).

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

51013325520 is a wasteful number, since it uses less digits than its factorization.

51013325520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26561 (or 26552 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

Adding to 51013325520 its reverse (2552331015), we get a palindrome (53565656535).

The spelling of 51013325520 in words is "fifty-one billion, thirteen million, three hundred twenty-five thousand, five hundred twenty".