22718166 has 16 divisors (see below), whose sum is σ = 45585264. Its totient is φ = 7547904.

The previous prime is 22718161. The next prime is 22718183. The reversal of 22718166 is 66181722.

It is a super-2 number, since 2×22718166² = 1032230132807112, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22718161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4171 + ... + 7926.

It is an arithmetic number, because the mean of its divisors is an integer number (2849079).

Almost surely, 2^22718166 is an apocalyptic number.

22718166 is an abundant number, since it is smaller than the sum of its proper divisors (22867098).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22718166 is a wasteful number, since it uses less digits than its factorization.

22718166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12415.

The product of its digits is 8064, while the sum is 33.

The square root of 22718166 is about 4766.3577289163. The cubic root of 22718166 is about 283.2203289454.

Adding to 22718166 its reverse (66181722), we get a palindrome (88899888).

The spelling of 22718166 in words is "twenty-two million, seven hundred eighteen thousand, one hundred sixty-six".