23256865 has 4 divisors (see below), whose sum is σ = 27908244. Its totient is φ = 18605488.

The previous prime is 23256829. The next prime is 23256899. The reversal of 23256865 is 56865232.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4835601 + 18421264 = 2199^2 + 4292^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23256865 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 2325682 + ... + 2325691.

It is an arithmetic number, because the mean of its divisors is an integer number (6977061).

Almost surely, 2^23256865 is an apocalyptic number.

It is an amenable number.

23256865 is a deficient number, since it is larger than the sum of its proper divisors (4651379).

23256865 is an equidigital number, since it uses as much as digits as its factorization.

23256865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4651378.

The product of its digits is 86400, while the sum is 37.

The square root of 23256865 is about 4822.5371952946. The cubic root of 23256865 is about 285.4414621280.

The spelling of 23256865 in words is "twenty-three million, two hundred fifty-six thousand, eight hundred sixty-five".