51430502320 has 20 divisors (see below), whose sum is σ = 119575918080. Its totient is φ = 20572200896.

The previous prime is 51430502309. The next prime is 51430502359. The reversal of 51430502320 is 2320503415.

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321440560 + ... + 321440719.

It is an arithmetic number, because the mean of its divisors is an integer number (5978795904).

Almost surely, 2^51430502320 is an apocalyptic number.

It is an amenable number.

51430502320 is an abundant number, since it is smaller than the sum of its proper divisors (68145415760).

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

51430502320 is a wasteful number, since it uses less digits than its factorization.

51430502320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642881292 (or 642881286 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

The spelling of 51430502320 in words is "fifty-one billion, four hundred thirty million, five hundred two thousand, three hundred twenty".