56168257 has 4 divisors (see below), whose sum is σ = 57686356. Its totient is φ = 54650160.

The previous prime is 56168227. The next prime is 56168261. The reversal of 56168257 is 75286165.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75286165 = 5 ⋅15057233.

It can be written as a sum of positive squares in 2 ways, for example, as 21169201 + 34999056 = 4601^2 + 5916^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56168257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56168227) 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, 758994 + ... + 759067.

It is an arithmetic number, because the mean of its divisors is an integer number (14421589).

Almost surely, 2^56168257 is an apocalyptic number.

It is an amenable number.

56168257 is a deficient number, since it is larger than the sum of its proper divisors (1518099).

56168257 is a wasteful number, since it uses less digits than its factorization.

56168257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1518098.

The product of its digits is 100800, while the sum is 40.

The square root of 56168257 is about 7494.5484853992. The cubic root of 56168257 is about 382.9690249385.

The spelling of 56168257 in words is "fifty-six million, one hundred sixty-eight thousand, two hundred fifty-seven".