23256563 has 16 divisors (see below), whose sum is σ = 25983072. Its totient is φ = 20812000.

The previous prime is 23256523. The next prime is 23256599. The reversal of 23256563 is 36565232.

It is not a de Polignac number, because 23256563 - 2²² = 19062259 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23256523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134345 + ... + 134517.

It is an arithmetic number, because the mean of its divisors is an integer number (1623942).

Almost surely, 2^23256563 is an apocalyptic number.

23256563 is a deficient number, since it is larger than the sum of its proper divisors (2726509).

23256563 is a wasteful number, since it uses less digits than its factorization.

23256563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307 (or 285 counting only the distinct ones).

The product of its digits is 32400, while the sum is 32.

The square root of 23256563 is about 4822.5058838741. The cubic root of 23256563 is about 285.4402265975.

It can be divided in two parts, 2325 and 6563, that added together give a palindrome (8888).

The spelling of 23256563 in words is "twenty-three million, two hundred fifty-six thousand, five hundred sixty-three".