56257181 has 2 divisors, whose sum is σ = 56257182. Its totient is φ = 56257180.

The previous prime is 56257177. The next prime is 56257193. The reversal of 56257181 is 18175265.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30349081 + 25908100 = 5509^2 + 5090^2 .

It is a cyclic number.

It is not a de Polignac number, because 56257181 - 2² = 56257177 is a prime.

It is a super-2 number, since 2×56257181² = 6329740828133522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56257111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28128590 + 28128591.

It is an arithmetic number, because the mean of its divisors is an integer number (28128591).

Almost surely, 2^56257181 is an apocalyptic number.

It is an amenable number.

56257181 is a deficient number, since it is larger than the sum of its proper divisors (1).

56257181 is an equidigital number, since it uses as much as digits as its factorization.

56257181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16800, while the sum is 35.

The square root of 56257181 is about 7500.4787180553. The cubic root of 56257181 is about 383.1710202972.

The spelling of 56257181 in words is "fifty-six million, two hundred fifty-seven thousand, one hundred eighty-one".