22643265 has 8 divisors (see below), whose sum is σ = 36229248. Its totient is φ = 12076400.

The previous prime is 22643251. The next prime is 22643311. The reversal of 22643265 is 56234622.

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

It is not a de Polignac number, because 22643265 - 2¹³ = 22635073 is a prime.

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, 754761 + ... + 754790.

It is an arithmetic number, because the mean of its divisors is an integer number (4528656).

Almost surely, 2^22643265 is an apocalyptic number.

It is an amenable number.

22643265 is a deficient number, since it is larger than the sum of its proper divisors (13585983).

22643265 is a wasteful number, since it uses less digits than its factorization.

22643265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1509559.

The product of its digits is 17280, while the sum is 30.

The square root of 22643265 is about 4758.4939844451. The cubic root of 22643265 is about 282.9087304061.

Adding to 22643265 its reverse (56234622), we get a palindrome (78877887).

The spelling of 22643265 in words is "twenty-two million, six hundred forty-three thousand, two hundred sixty-five".