51330725020 has 24 divisors (see below), whose sum is σ = 107846260704. Its totient is φ = 20522435136.

The previous prime is 51330724993. The next prime is 51330725057. The reversal of 51330725020 is 2052703315.

It is a self number, because there is not a number n which added to its sum of digits gives 51330725020.

It is a congruent number.

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, 573147 + ... + 656626.

It is an arithmetic number, because the mean of its divisors is an integer number (4493594196).

Almost surely, 2^51330725020 is an apocalyptic number.

It is an amenable number.

51330725020 is an abundant number, since it is smaller than the sum of its proper divisors (56515535684).

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

51330725020 is a wasteful number, since it uses less digits than its factorization.

51330725020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1231869 (or 1231867 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 28.

The spelling of 51330725020 in words is "fifty-one billion, three hundred thirty million, seven hundred twenty-five thousand, twenty".