55981056 has 44 divisors (see below), whose sum is σ = 149218112. Its totient is φ = 18659328.

The previous prime is 55980971. The next prime is 55981067. The reversal of 55981056 is 65018955.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

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, 6040 + ... + 12183.

Almost surely, 2^55981056 is an apocalyptic number.

It is an amenable number.

55981056 is an abundant number, since it is smaller than the sum of its proper divisors (93237056).

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

55981056 is a wasteful number, since it uses less digits than its factorization.

55981056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18246 (or 18228 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 39.

The square root of 55981056 is about 7482.0489172419. The cubic root of 55981056 is about 382.5430905361.

The spelling of 55981056 in words is "fifty-five million, nine hundred eighty-one thousand, fifty-six".