256562179 has 2 divisors, whose sum is σ = 256562180. Its totient is φ = 256562178.

The previous prime is 256562161. The next prime is 256562191. The reversal of 256562179 is 971265652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256562179 - 2¹¹ = 256560131 is a prime.

It is not a weakly prime, because it can be changed into another prime (256562879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128281089 + 128281090.

It is an arithmetic number, because the mean of its divisors is an integer number (128281090).

Almost surely, 2^256562179 is an apocalyptic number.

256562179 is a deficient number, since it is larger than the sum of its proper divisors (1).

256562179 is an equidigital number, since it uses as much as digits as its factorization.

256562179 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 226800, while the sum is 43.

The square root of 256562179 is about 16017.5584593907. The cubic root of 256562179 is about 635.4248744794.

The spelling of 256562179 in words is "two hundred fifty-six million, five hundred sixty-two thousand, one hundred seventy-nine".