22502165 has 16 divisors (see below), whose sum is σ = 32203008. Its totient is φ = 14758656.

The previous prime is 22502159. The next prime is 22502167. The reversal of 22502165 is 56120522.

It is a cyclic number.

It is not a de Polignac number, because 22502165 - 2¹⁶ = 22436629 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22502165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22502167) 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, 13172 + ... + 14781.

It is an arithmetic number, because the mean of its divisors is an integer number (2012688).

Almost surely, 2^22502165 is an apocalyptic number.

It is an amenable number.

22502165 is a deficient number, since it is larger than the sum of its proper divisors (9700843).

22502165 is a wasteful number, since it uses less digits than its factorization.

22502165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27988.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 22502165 is about 4743.6446958009. The cubic root of 22502165 is about 282.3198632317.

Adding to 22502165 its reverse (56120522), we get a palindrome (78622687).

The spelling of 22502165 in words is "twenty-two million, five hundred two thousand, one hundred sixty-five".