256337287 has 2 divisors, whose sum is σ = 256337288. Its totient is φ = 256337286.

The previous prime is 256337281. The next prime is 256337321. The reversal of 256337287 is 782733652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256337287 - 2²⁷ = 122119559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256337281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128168643 + 128168644.

It is an arithmetic number, because the mean of its divisors is an integer number (128168644).

Almost surely, 2^256337287 is an apocalyptic number.

256337287 is a deficient number, since it is larger than the sum of its proper divisors (1).

256337287 is an equidigital number, since it uses as much as digits as its factorization.

256337287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 423360, while the sum is 43.

The square root of 256337287 is about 16010.5367492786. The cubic root of 256337287 is about 635.2391576475.

The spelling of 256337287 in words is "two hundred fifty-six million, three hundred thirty-seven thousand, two hundred eighty-seven".