22643565 has 16 divisors (see below), whose sum is σ = 41405568. Its totient is φ = 10351296.

The previous prime is 22643563. The next prime is 22643581. The reversal of 22643565 is 56534622.

It is not a de Polignac number, because 22643565 - 2¹ = 22643563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22643563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107722 + ... + 107931.

It is an arithmetic number, because the mean of its divisors is an integer number (2587848).

Almost surely, 2^22643565 is an apocalyptic number.

It is an amenable number.

22643565 is a deficient number, since it is larger than the sum of its proper divisors (18762003).

22643565 is a wasteful number, since it uses less digits than its factorization.

22643565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215668.

The product of its digits is 43200, while the sum is 33.

The square root of 22643565 is about 4758.5255069191. The cubic root of 22643565 is about 282.9099798172.

The spelling of 22643565 in words is "twenty-two million, six hundred forty-three thousand, five hundred sixty-five".