256262563 has 4 divisors (see below), whose sum is σ = 256949968. Its totient is φ = 255575160.

The previous prime is 256262549. The next prime is 256262609. The reversal of 256262563 is 365262652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256262563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256262533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 343143 + ... + 343888.

It is an arithmetic number, because the mean of its divisors is an integer number (64237492).

Almost surely, 2^256262563 is an apocalyptic number.

256262563 is a deficient number, since it is larger than the sum of its proper divisors (687405).

256262563 is an equidigital number, since it uses as much as digits as its factorization.

256262563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687404.

The product of its digits is 129600, while the sum is 37.

The square root of 256262563 is about 16008.2029909668. The cubic root of 256262563 is about 635.1774261888.

The spelling of 256262563 in words is "two hundred fifty-six million, two hundred sixty-two thousand, five hundred sixty-three".