22272185 has 16 divisors (see below), whose sum is σ = 28909776. Its totient is φ = 16374528.

The previous prime is 22272181. The next prime is 22272209. The reversal of 22272185 is 58127222.

It can be written as a sum of positive squares in 8 ways, for example, as 2085136 + 20187049 = 1444^2 + 4493^2 .

It is a cyclic number.

It is not a de Polignac number, because 22272185 - 2² = 22272181 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22272181) 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, 17387 + ... + 18623.

It is an arithmetic number, because the mean of its divisors is an integer number (1806861).

Almost surely, 2^22272185 is an apocalyptic number.

It is an amenable number.

22272185 is a deficient number, since it is larger than the sum of its proper divisors (6637591).

22272185 is a wasteful number, since it uses less digits than its factorization.

22272185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1532.

The product of its digits is 4480, while the sum is 29.

The square root of 22272185 is about 4719.3415854333. The cubic root of 22272185 is about 281.3547652501.

The spelling of 22272185 in words is "twenty-two million, two hundred seventy-two thousand, one hundred eighty-five".