51550105321 has 24 divisors (see below), whose sum is σ = 63542788416. Its totient is φ = 41377976640.

The previous prime is 51550105301. The next prime is 51550105333. The reversal of 51550105321 is 12350105515.

It is a de Polignac number, because none of the positive numbers 2^k-51550105321 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51550105321.

It is not an unprimeable number, because it can be changed into a prime (51550105301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 560070 + ... + 645583.

It is an arithmetic number, because the mean of its divisors is an integer number (2647616184).

Almost surely, 2^51550105321 is an apocalyptic number.

It is an amenable number.

51550105321 is a deficient number, since it is larger than the sum of its proper divisors (11992683095).

51550105321 is a wasteful number, since it uses less digits than its factorization.

51550105321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1205713 (or 1205700 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 28.

The spelling of 51550105321 in words is "fifty-one billion, five hundred fifty million, one hundred five thousand, three hundred twenty-one".