51234643215 has 48 divisors (see below), whose sum is σ = 104993179200. Its totient is φ = 22613907456.

The previous prime is 51234643183. The next prime is 51234643241.

51234643215 is a `hidden beast` number, since 5 + 1 + 2 + 3 + 4 + 643 + 2 + 1 + 5 = 666.

51234643215 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 51234643215 - 2⁵ = 51234643183 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51234643215.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2795170 + ... + 2813439.

It is an arithmetic number, because the mean of its divisors is an integer number (2187357900).

Almost surely, 2^51234643215 is an apocalyptic number.

51234643215 is an abundant number, since it is smaller than the sum of its proper divisors (53758535985).

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

51234643215 is a wasteful number, since it uses less digits than its factorization.

51234643215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5608656 (or 5608653 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The spelling of 51234643215 in words is "fifty-one billion, two hundred thirty-four million, six hundred forty-three thousand, two hundred fifteen".