51715812 has 24 divisors (see below), whose sum is σ = 124563712. Its totient is φ = 16682400.

The previous prime is 51715747. The next prime is 51715823. The reversal of 51715812 is 21851715.

51715812 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 51715812.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 69139 + ... + 69882.

Almost surely, 2^51715812 is an apocalyptic number.

It is an amenable number.

51715812 is an abundant number, since it is smaller than the sum of its proper divisors (72847900).

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

51715812 is a wasteful number, since it uses less digits than its factorization.

51715812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139059 (or 139057 counting only the distinct ones).

The product of its digits is 2800, while the sum is 30.

The square root of 51715812 is about 7191.3706621200. The cubic root of 51715812 is about 372.5699149581.

The spelling of 51715812 in words is "fifty-one million, seven hundred fifteen thousand, eight hundred twelve".