56321857 has 4 divisors (see below), whose sum is σ = 58264020. Its totient is φ = 54379696.

The previous prime is 56321843. The next prime is 56321893. The reversal of 56321857 is 75812365.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75812365 = 5 ⋅15162473.

It can be written as a sum of positive squares in 2 ways, for example, as 37994896 + 18326961 = 6164^2 + 4281^2 .

It is a cyclic number.

It is not a de Polignac number, because 56321857 - 2⁷ = 56321729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56321897) 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, 971038 + ... + 971095.

It is an arithmetic number, because the mean of its divisors is an integer number (14566005).

Almost surely, 2^56321857 is an apocalyptic number.

It is an amenable number.

56321857 is a deficient number, since it is larger than the sum of its proper divisors (1942163).

56321857 is a wasteful number, since it uses less digits than its factorization.

56321857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1942162.

The product of its digits is 50400, while the sum is 37.

The square root of 56321857 is about 7504.7889377384. The cubic root of 56321857 is about 383.3178014291.

The spelling of 56321857 in words is "fifty-six million, three hundred twenty-one thousand, eight hundred fifty-seven".