56005231 has 2 divisors, whose sum is σ = 56005232. Its totient is φ = 56005230.

The previous prime is 56005199. The next prime is 56005237. The reversal of 56005231 is 13250065.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56005231 - 2⁵ = 56005199 is a prime.

It is a super-2 number, since 2×56005231² = 6273171798726722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56005237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28002615 + 28002616.

It is an arithmetic number, because the mean of its divisors is an integer number (28002616).

Almost surely, 2^56005231 is an apocalyptic number.

56005231 is a deficient number, since it is larger than the sum of its proper divisors (1).

56005231 is an equidigital number, since it uses as much as digits as its factorization.

56005231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 56005231 is about 7483.6642762754. The cubic root of 56005231 is about 382.5981487348.

Adding to 56005231 its reverse (13250065), we get a palindrome (69255296).

The spelling of 56005231 in words is "fifty-six million, five thousand, two hundred thirty-one".