51512056 has 8 divisors (see below), whose sum is σ = 96585120. Its totient is φ = 25756024.

The previous prime is 51512039. The next prime is 51512099. The reversal of 51512056 is 65021515.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 51512056.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3219496 + ... + 3219511.

It is an arithmetic number, because the mean of its divisors is an integer number (12073140).

Almost surely, 2^51512056 is an apocalyptic number.

It is an amenable number.

51512056 is a deficient number, since it is larger than the sum of its proper divisors (45073064).

51512056 is a wasteful number, since it uses less digits than its factorization.

51512056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6439013 (or 6439009 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 51512056 is about 7177.1899793721. The cubic root of 51512056 is about 372.0799727857.

The spelling of 51512056 in words is "fifty-one million, five hundred twelve thousand, fifty-six".