256287263 has 2 divisors, whose sum is σ = 256287264. Its totient is φ = 256287262.

The previous prime is 256287253. The next prime is 256287281. The reversal of 256287263 is 362782652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256287263 - 2⁴ = 256287247 is a prime.

It is a super-2 number, since 2×256287263² = 131366322352062338, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 256287263.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256287203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128143631 + 128143632.

It is an arithmetic number, because the mean of its divisors is an integer number (128143632).

Almost surely, 2^256287263 is an apocalyptic number.

256287263 is a deficient number, since it is larger than the sum of its proper divisors (1).

256287263 is an equidigital number, since it uses as much as digits as its factorization.

256287263 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 41.

The square root of 256287263 is about 16008.9744518504. The cubic root of 256287263 is about 635.1978328350.

The spelling of 256287263 in words is "two hundred fifty-six million, two hundred eighty-seven thousand, two hundred sixty-three".