22165155 has 24 divisors (see below), whose sum is σ = 39661440. Its totient is φ = 11439360.

The previous prime is 22165151. The next prime is 22165163. The reversal of 22165155 is 55156122.

22165155 is a `hidden beast` number, since 2 + 2 + 1 + 651 + 5 + 5 = 666.

It is not a de Polignac number, because 22165155 - 2² = 22165151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22165151) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6550 + ... + 9339.

It is an arithmetic number, because the mean of its divisors is an integer number (1652560).

Almost surely, 2^22165155 is an apocalyptic number.

22165155 is a deficient number, since it is larger than the sum of its proper divisors (17496285).

22165155 is a wasteful number, since it uses less digits than its factorization.

22165155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15931 (or 15928 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 22165155 is about 4707.9884239450. The cubic root of 22165155 is about 280.9033536676.

The spelling of 22165155 in words is "twenty-two million, one hundred sixty-five thousand, one hundred fifty-five".