22215165 has 16 divisors (see below), whose sum is σ = 40622208. Its totient is φ = 10155456.

The previous prime is 22215157. The next prime is 22215169. The reversal of 22215165 is 56151222.

It is a happy number.

It is not a de Polignac number, because 22215165 - 2³ = 22215157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22215169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105682 + ... + 105891.

It is an arithmetic number, because the mean of its divisors is an integer number (2538888).

Almost surely, 2^22215165 is an apocalyptic number.

It is an amenable number.

22215165 is a deficient number, since it is larger than the sum of its proper divisors (18407043).

22215165 is a wasteful number, since it uses less digits than its factorization.

22215165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211588.

The product of its digits is 1200, while the sum is 24.

The square root of 22215165 is about 4713.2966170187. The cubic root of 22215165 is about 281.1144571575.

Adding to 22215165 its reverse (56151222), we get a palindrome (78366387).

The spelling of 22215165 in words is "twenty-two million, two hundred fifteen thousand, one hundred sixty-five".