256323259 has 2 divisors, whose sum is σ = 256323260. Its totient is φ = 256323258.

The previous prime is 256323251. The next prime is 256323299. The reversal of 256323259 is 952323652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256323259 - 2³ = 256323251 is a prime.

It is a super-2 number, since 2×256323259² = 131403226208762162, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (256323251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128161629 + 128161630.

It is an arithmetic number, because the mean of its divisors is an integer number (128161630).

Almost surely, 2^256323259 is an apocalyptic number.

256323259 is a deficient number, since it is larger than the sum of its proper divisors (1).

256323259 is an equidigital number, since it uses as much as digits as its factorization.

256323259 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97200, while the sum is 37.

The square root of 256323259 is about 16010.0986567853. The cubic root of 256323259 is about 635.2275696631.

The spelling of 256323259 in words is "two hundred fifty-six million, three hundred twenty-three thousand, two hundred fifty-nine".