56057831 has 8 divisors (see below), whose sum is σ = 59015520. Its totient is φ = 53143552.

The previous prime is 56057821. The next prime is 56057839. The reversal of 56057831 is 13875065.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56057831 - 2¹⁰ = 56056807 is a prime.

It is a super-2 number, since 2×56057831² = 6284960832849122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56057791 and 56057800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56057839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8186 + ... + 13383.

It is an arithmetic number, because the mean of its divisors is an integer number (7376940).

Almost surely, 2^56057831 is an apocalyptic number.

56057831 is a deficient number, since it is larger than the sum of its proper divisors (2957689).

56057831 is a wasteful number, since it uses less digits than its factorization.

56057831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21705.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 56057831 is about 7487.1777726991. The cubic root of 56057831 is about 382.7178897257.

The spelling of 56057831 in words is "fifty-six million, fifty-seven thousand, eight hundred thirty-one".