256522563 has 24 divisors (see below), whose sum is σ = 413624640. Its totient is φ = 151850160.

The previous prime is 256522531. The next prime is 256522577. The reversal of 256522563 is 365225652.

256522563 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 256522563 - 2⁵ = 256522531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256522523) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25873 + ... + 34386.

It is an arithmetic number, because the mean of its divisors is an integer number (17234360).

Almost surely, 2^256522563 is an apocalyptic number.

256522563 is a deficient number, since it is larger than the sum of its proper divisors (157102077).

256522563 is a wasteful number, since it uses less digits than its factorization.

256522563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60319 (or 60316 counting only the distinct ones).

The product of its digits is 108000, while the sum is 36.

The square root of 256522563 is about 16016.3217687458. The cubic root of 256522563 is about 635.3921672845.

It can be divided in two parts, 2 and 56522563, that added together give a palindrome (56522565).

The spelling of 256522563 in words is "two hundred fifty-six million, five hundred twenty-two thousand, five hundred sixty-three".