56005551 has 24 divisors (see below), whose sum is σ = 92676480. Its totient is φ = 31926096.

The previous prime is 56005541. The next prime is 56005567. The reversal of 56005551 is 15550065.

56005551 is a `hidden beast` number, since 5 + 600 + 5 + 5 + 51 = 666.

It is not a de Polignac number, because 56005551 - 2⁹ = 56005039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56005541) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34680 + ... + 36258.

It is an arithmetic number, because the mean of its divisors is an integer number (3861520).

Almost surely, 2^56005551 is an apocalyptic number.

56005551 is a deficient number, since it is larger than the sum of its proper divisors (36670929).

56005551 is a wasteful number, since it uses less digits than its factorization.

56005551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2155 (or 2152 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 27.

The square root of 56005551 is about 7483.6856561456. The cubic root of 56005551 is about 382.5988774237.

The spelling of 56005551 in words is "fifty-six million, five thousand, five hundred fifty-one".