22740165 has 36 divisors (see below), whose sum is σ = 45856044. Its totient is φ = 10394496.

The previous prime is 22740161. The next prime is 22740167. The reversal of 22740165 is 56104722.

It can be written as a sum of positive squares in 2 ways, for example, as 8767521 + 13972644 = 2961^2 + 3738^2 .

It is not a de Polignac number, because 22740165 - 2² = 22740161 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22740161) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2952 + ... + 7361.

It is an arithmetic number, because the mean of its divisors is an integer number (1273779).

Almost surely, 2^22740165 is an apocalyptic number.

It is an amenable number.

22740165 is an abundant number, since it is smaller than the sum of its proper divisors (23115879).

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

22740165 is a wasteful number, since it uses less digits than its factorization.

22740165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10338 (or 10328 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 22740165 is about 4768.6649074977. The cubic root of 22740165 is about 283.3117176897.

Adding to 22740165 its reverse (56104722), we get a palindrome (78844887).

The spelling of 22740165 in words is "twenty-two million, seven hundred forty thousand, one hundred sixty-five".