22506165 has 48 divisors (see below), whose sum is σ = 44815680. Its totient is φ = 10333440.

The previous prime is 22506163. The next prime is 22506173. The reversal of 22506165 is 56160522.

It is not a de Polignac number, because 22506165 - 2¹ = 22506163 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22506161) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8209 + ... + 10601.

It is an arithmetic number, because the mean of its divisors is an integer number (933660).

Almost surely, 2^22506165 is an apocalyptic number.

It is an amenable number.

22506165 is a deficient number, since it is larger than the sum of its proper divisors (22309515).

22506165 is a wasteful number, since it uses less digits than its factorization.

22506165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2434 (or 2431 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 22506165 is about 4744.0662938032. The cubic root of 22506165 is about 282.3365906969.

Adding to 22506165 its reverse (56160522), we get a palindrome (78666687).

The spelling of 22506165 in words is "twenty-two million, five hundred six thousand, one hundred sixty-five".