256336559 has 2 divisors, whose sum is σ = 256336560. Its totient is φ = 256336558.

The previous prime is 256336547. The next prime is 256336601. The reversal of 256336559 is 955633652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256336559 - 2¹² = 256332463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256336519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128168279 + 128168280.

It is an arithmetic number, because the mean of its divisors is an integer number (128168280).

Almost surely, 2^256336559 is an apocalyptic number.

256336559 is a deficient number, since it is larger than the sum of its proper divisors (1).

256336559 is an equidigital number, since it uses as much as digits as its factorization.

256336559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 729000, while the sum is 44.

The square root of 256336559 is about 16010.5140142345. The cubic root of 256336559 is about 635.2385562854.

The spelling of 256336559 in words is "two hundred fifty-six million, three hundred thirty-six thousand, five hundred fifty-nine".