256589159 has 2 divisors, whose sum is σ = 256589160. Its totient is φ = 256589158.

The previous prime is 256589141. The next prime is 256589189. The reversal of 256589159 is 951985652.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256589159 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256589189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128294579 + 128294580.

It is an arithmetic number, because the mean of its divisors is an integer number (128294580).

Almost surely, 2^256589159 is an apocalyptic number.

256589159 is a deficient number, since it is larger than the sum of its proper divisors (1).

256589159 is an equidigital number, since it uses as much as digits as its factorization.

256589159 is an evil number, because the sum of its binary digits is even.

The product of its digits is 972000, while the sum is 50.

The square root of 256589159 is about 16018.4006380163. The cubic root of 256589159 is about 635.4471473936.

The spelling of 256589159 in words is "two hundred fifty-six million, five hundred eighty-nine thousand, one hundred fifty-nine".