22556165 has 8 divisors (see below), whose sum is σ = 27139320. Its totient is φ = 17996992.

The previous prime is 22556141. The next prime is 22556179. The reversal of 22556165 is 56165522.

It can be written as a sum of positive squares in 4 ways, for example, as 3389281 + 19166884 = 1841^2 + 4378^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22556165 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3854 + ... + 7743.

It is an arithmetic number, because the mean of its divisors is an integer number (3392415).

Almost surely, 2^22556165 is an apocalyptic number.

It is an amenable number.

22556165 is a deficient number, since it is larger than the sum of its proper divisors (4583155).

22556165 is a wasteful number, since it uses less digits than its factorization.

22556165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11991.

The product of its digits is 18000, while the sum is 32.

The square root of 22556165 is about 4749.3331110799. Note that the first 3 decimals coincide. The cubic root of 22556165 is about 282.5455169825.

The spelling of 22556165 in words is "twenty-two million, five hundred fifty-six thousand, one hundred sixty-five".