51530321982 has 16 divisors (see below), whose sum is σ = 103181475600. Its totient is φ = 17156635392.

The previous prime is 51530321939. The next prime is 51530322007. The reversal of 51530321982 is 28912303515.

It is a self number, because there is not a number n which added to its sum of digits gives 51530321982.

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, 5029107 + ... + 5039342.

It is an arithmetic number, because the mean of its divisors is an integer number (6448842225).

Almost surely, 2^51530321982 is an apocalyptic number.

51530321982 is an abundant number, since it is smaller than the sum of its proper divisors (51651153618).

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

51530321982 is a wasteful number, since it uses less digits than its factorization.

51530321982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10069307.

The product of its (nonzero) digits is 64800, while the sum is 39.

The spelling of 51530321982 in words is "fifty-one billion, five hundred thirty million, three hundred twenty-one thousand, nine hundred eighty-two".