51319656 has 48 divisors (see below), whose sum is σ = 144144000. Its totient is φ = 17105904.

The previous prime is 51319621. The next prime is 51319669. The reversal of 51319656 is 65691315.

51319656 is a `hidden beast` number, since 513 + 1 + 96 + 56 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 51319656.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11256 + ... + 15143.

It is an arithmetic number, because the mean of its divisors is an integer number (3003000).

Almost surely, 2^51319656 is an apocalyptic number.

It is an amenable number.

51319656 is an abundant number, since it is smaller than the sum of its proper divisors (92824344).

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

51319656 is a wasteful number, since it uses less digits than its factorization.

51319656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26420 (or 26404 counting only the distinct ones).

The product of its digits is 24300, while the sum is 36.

The square root of 51319656 is about 7163.7738657777. The cubic root of 51319656 is about 371.6161493227.

The spelling of 51319656 in words is "fifty-one million, three hundred nineteen thousand, six hundred fifty-six".