51561056 has 24 divisors (see below), whose sum is σ = 103030200. Its totient is φ = 25394688.

The previous prime is 51561049. The next prime is 51561061. The reversal of 51561056 is 65016515.

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, 9881 + ... + 14168.

It is an arithmetic number, because the mean of its divisors is an integer number (4292925).

Almost surely, 2^51561056 is an apocalyptic number.

It is an amenable number.

51561056 is a deficient number, since it is larger than the sum of its proper divisors (51469144).

51561056 is a wasteful number, since it uses less digits than its factorization.

51561056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24126 (or 24118 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 51561056 is about 7180.6027602145. The cubic root of 51561056 is about 372.1979137249.

The spelling of 51561056 in words is "fifty-one million, five hundred sixty-one thousand, fifty-six".