56543857 has 4 divisors (see below), whose sum is σ = 56856436. Its totient is φ = 56231280.

The previous prime is 56543849. The next prime is 56543863. The reversal of 56543857 is 75834565.

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

It can be written as a sum of positive squares in 2 ways, for example, as 12666481 + 43877376 = 3559^2 + 6624^2 .

It is a cyclic number.

It is not a de Polignac number, because 56543857 - 2³ = 56543849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56543827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156018 + ... + 156379.

It is an arithmetic number, because the mean of its divisors is an integer number (14214109).

Almost surely, 2^56543857 is an apocalyptic number.

It is an amenable number.

56543857 is a deficient number, since it is larger than the sum of its proper divisors (312579).

56543857 is a wasteful number, since it uses less digits than its factorization.

56543857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312578.

The product of its digits is 504000, while the sum is 43.

The square root of 56543857 is about 7519.5649475219. The cubic root of 56543857 is about 383.8207736570.

The spelling of 56543857 in words is "fifty-six million, five hundred forty-three thousand, eight hundred fifty-seven".