256336159 has 2 divisors, whose sum is σ = 256336160. Its totient is φ = 256336158.

The previous prime is 256336147. The next prime is 256336181. The reversal of 256336159 is 951633652.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256336159 - 2¹⁷ = 256205087 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256336139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128168079 + 128168080.

It is an arithmetic number, because the mean of its divisors is an integer number (128168080).

Almost surely, 2^256336159 is an apocalyptic number.

256336159 is a deficient number, since it is larger than the sum of its proper divisors (1).

256336159 is an equidigital number, since it uses as much as digits as its factorization.

256336159 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145800, while the sum is 40.

The square root of 256336159 is about 16010.5015224383. The cubic root of 256336159 is about 635.2382258662.

The spelling of 256336159 in words is "two hundred fifty-six million, three hundred thirty-six thousand, one hundred fifty-nine".