51315533552 has 20 divisors (see below), whose sum is σ = 102631068096. Its totient is φ = 24830096640.

The previous prime is 51315533551. The next prime is 51315533557. The reversal of 51315533552 is 25533551315.

51315533552 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51315533551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51728873 + ... + 51729864.

Almost surely, 2^51315533552 is an apocalyptic number.

It is an amenable number.

51315533552 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

51315533552 is a wasteful number, since it uses less digits than its factorization.

51315533552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103458776 (or 103458770 counting only the distinct ones).

The product of its digits is 168750, while the sum is 38.

The spelling of 51315533552 in words is "fifty-one billion, three hundred fifteen million, five hundred thirty-three thousand, five hundred fifty-two".