51715968 has 32 divisors (see below), whose sum is σ = 137371560. Its totient is φ = 17238528.

The previous prime is 51715897. The next prime is 51715987. The reversal of 51715968 is 86951715.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66955 + ... + 67722.

Almost surely, 2^51715968 is an apocalyptic number.

It is an amenable number.

51715968 is an abundant number, since it is smaller than the sum of its proper divisors (85655592).

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

51715968 is a wasteful number, since it uses less digits than its factorization.

51715968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134694 (or 134682 counting only the distinct ones).

The product of its digits is 75600, while the sum is 42.

The square root of 51715968 is about 7191.3815084447. The cubic root of 51715968 is about 372.5702895750.

The spelling of 51715968 in words is "fifty-one million, seven hundred fifteen thousand, nine hundred sixty-eight".