22117165 has 16 divisors (see below), whose sum is σ = 30907008. Its totient is φ = 14878656.

The previous prime is 22117103. The next prime is 22117171. The reversal of 22117165 is 56171122.

It is a cyclic number.

It is not a de Polignac number, because 22117165 - 2⁷ = 22117037 is a prime.

It is a Duffinian number.

It is a congruent 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, 4107 + ... + 7816.

It is an arithmetic number, because the mean of its divisors is an integer number (1931688).

Almost surely, 2^22117165 is an apocalyptic number.

It is an amenable number.

22117165 is a deficient number, since it is larger than the sum of its proper divisors (8789843).

22117165 is a wasteful number, since it uses less digits than its factorization.

22117165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11988.

The product of its digits is 840, while the sum is 25.

The square root of 22117165 is about 4702.8890057070. The cubic root of 22117165 is about 280.7004782893.

Adding to 22117165 its reverse (56171122), we get a palindrome (78288287).

The spelling of 22117165 in words is "twenty-two million, one hundred seventeen thousand, one hundred sixty-five".