56011557 has 32 divisors (see below), whose sum is σ = 90144000. Its totient is φ = 30886464.

The previous prime is 56011547. The next prime is 56011559. The reversal of 56011557 is 75511065.

It is not a de Polignac number, because 56011557 - 2⁶ = 56011493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56011559) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28903 + ... + 30779.

It is an arithmetic number, because the mean of its divisors is an integer number (2817000).

Almost surely, 2^56011557 is an apocalyptic number.

It is an amenable number.

56011557 is a deficient number, since it is larger than the sum of its proper divisors (34132443).

56011557 is a wasteful number, since it uses less digits than its factorization.

56011557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1930 (or 1916 counting only the distinct ones).

The product of its (nonzero) digits is 5250, while the sum is 30.

The square root of 56011557 is about 7484.0869182553. The cubic root of 56011557 is about 382.6125534890.

The spelling of 56011557 in words is "fifty-six million, eleven thousand, five hundred fifty-seven".