256823227 has 2 divisors, whose sum is σ = 256823228. Its totient is φ = 256823226.

The previous prime is 256823207. The next prime is 256823243. The reversal of 256823227 is 722328652.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256823227 is a prime.

It is not a weakly prime, because it can be changed into another prime (256823207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128411613 + 128411614.

It is an arithmetic number, because the mean of its divisors is an integer number (128411614).

Almost surely, 2^256823227 is an apocalyptic number.

256823227 is a deficient number, since it is larger than the sum of its proper divisors (1).

256823227 is an equidigital number, since it uses as much as digits as its factorization.

256823227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 37.

The square root of 256823227 is about 16025.7051950920. The cubic root of 256823227 is about 635.6403130477.

The spelling of 256823227 in words is "two hundred fifty-six million, eight hundred twenty-three thousand, two hundred twenty-seven".