51556056 has 32 divisors (see below), whose sum is σ = 130172400. Its totient is φ = 17014400.

The previous prime is 51556049. The next prime is 51556061. The reversal of 51556056 is 65065515.

51556056 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8211 + ... + 13058.

Almost surely, 2^51556056 is an apocalyptic number.

It is an amenable number.

51556056 is an abundant number, since it is smaller than the sum of its proper divisors (78616344).

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

51556056 is a wasteful number, since it uses less digits than its factorization.

51556056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21379 (or 21375 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 33.

The square root of 51556056 is about 7180.2545915866. The cubic root of 51556056 is about 372.1858823594.

It can be divided in two parts, 5155 and 6056, that added together give a palindrome (11211).

The spelling of 51556056 in words is "fifty-one million, five hundred fifty-six thousand, fifty-six".