256088281 has 2 divisors, whose sum is σ = 256088282. Its totient is φ = 256088280.

The previous prime is 256088257. The next prime is 256088293. The reversal of 256088281 is 182880652.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 158256400 + 97831881 = 12580^2 + 9891^2 .

It is a cyclic number.

It is not a de Polignac number, because 256088281 - 2¹⁷ = 255957209 is a prime.

It is a super-2 number, since 2×256088281² = 131162415331069922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (256088081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128044140 + 128044141.

It is an arithmetic number, because the mean of its divisors is an integer number (128044141).

Almost surely, 2^256088281 is an apocalyptic number.

It is an amenable number.

256088281 is a deficient number, since it is larger than the sum of its proper divisors (1).

256088281 is an equidigital number, since it uses as much as digits as its factorization.

256088281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61440, while the sum is 40.

The square root of 256088281 is about 16002.7585434512. The cubic root of 256088281 is about 635.0334006033.

The spelling of 256088281 in words is "two hundred fifty-six million, eighty-eight thousand, two hundred eighty-one".