51000056 has 16 divisors (see below), whose sum is σ = 96128640. Its totient is φ = 25365760.

The previous prime is 51000049. The next prime is 51000071. The reversal of 51000056 is 65000015.

It is a junction number, because it is equal to n+sod(n) for n = 50999998 and 51000043.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15161 + ... + 18216.

It is an arithmetic number, because the mean of its divisors is an integer number (6008040).

Almost surely, 2^51000056 is an apocalyptic number.

It is an amenable number.

51000056 is a deficient number, since it is larger than the sum of its proper divisors (45128584).

51000056 is a wasteful number, since it uses less digits than its factorization.

51000056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33574 (or 33570 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 51000056 is about 7141.4323493260. The cubic root of 51000056 is about 370.8431126599.

The spelling of 51000056 in words is "fifty-one million, fifty-six", and thus it is an aban number and an uban number.