22224865 has 16 divisors (see below), whose sum is σ = 30412368. Its totient is φ = 15446016.

The previous prime is 22224859. The next prime is 22224883. The reversal of 22224865 is 56842222.

It can be written as a sum of positive squares in 8 ways, for example, as 3154176 + 19070689 = 1776^2 + 4367^2 .

It is a cyclic number.

It is not a de Polignac number, because 22224865 - 2¹¹ = 22222817 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8952 + ... + 11161.

It is an arithmetic number, because the mean of its divisors is an integer number (1900773).

Almost surely, 2^22224865 is an apocalyptic number.

It is an amenable number.

22224865 is a deficient number, since it is larger than the sum of its proper divisors (8187503).

22224865 is a wasteful number, since it uses less digits than its factorization.

22224865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20148.

The product of its digits is 15360, while the sum is 31.

The square root of 22224865 is about 4714.3255084901. The cubic root of 22224865 is about 281.1553663510.

The spelling of 22224865 in words is "twenty-two million, two hundred twenty-four thousand, eight hundred sixty-five".