22865 has 8 divisors (see below), whose sum is σ = 29160. Its totient is φ = 17152.

The previous prime is 22861. The next prime is 22871. The reversal of 22865 is 56822.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 961 + 21904 = 31^2 + 148^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22865 - 2² = 22861 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22865.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50 + ... + 219.

It is an arithmetic number, because the mean of its divisors is an integer number (3645).

2²²⁸⁶⁵ is an apocalyptic number.

It is an amenable number.

22865 is a deficient number, since it is larger than the sum of its proper divisors (6295).

22865 is a wasteful number, since it uses less digits than its factorization.

22865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291.

The product of its digits is 960, while the sum is 23.

The square root of 22865 is about 151.2117720285. The cubic root of 22865 is about 28.3829197039.

The spelling of 22865 in words is "twenty-two thousand, eight hundred sixty-five".