56857555 has 4 divisors (see below), whose sum is σ = 68229072. Its totient is φ = 45486040.

The previous prime is 56857531. The next prime is 56857579. The reversal of 56857555 is 55575865.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (56857531) and next prime (56857579).

It is not a de Polignac number, because 56857555 - 2⁵ = 56857523 is a prime.

It is a Duffinian 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, 5685751 + ... + 5685760.

It is an arithmetic number, because the mean of its divisors is an integer number (17057268).

Almost surely, 2^56857555 is an apocalyptic number.

56857555 is a deficient number, since it is larger than the sum of its proper divisors (11371517).

56857555 is a wasteful number, since it uses less digits than its factorization.

56857555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11371516.

The product of its digits is 1050000, while the sum is 46.

The square root of 56857555 is about 7540.3948835588. The cubic root of 56857555 is about 384.5292610601.

The spelling of 56857555 in words is "fifty-six million, eight hundred fifty-seven thousand, five hundred fifty-five".