22545265 has 4 divisors (see below), whose sum is σ = 27054324. Its totient is φ = 18036208.

The previous prime is 22545253. The next prime is 22545283. The reversal of 22545265 is 56254522.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13830961 + 8714304 = 3719^2 + 2952^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22545265 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2254522 + ... + 2254531.

It is an arithmetic number, because the mean of its divisors is an integer number (6763581).

Almost surely, 2^22545265 is an apocalyptic number.

It is an amenable number.

22545265 is a deficient number, since it is larger than the sum of its proper divisors (4509059).

22545265 is an equidigital number, since it uses as much as digits as its factorization.

22545265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4509058.

The product of its digits is 24000, while the sum is 31.

The square root of 22545265 is about 4748.1854428824. The cubic root of 22545265 is about 282.4999973895.

Adding to 22545265 its reverse (56254522), we get a palindrome (78799787).

The spelling of 22545265 in words is "twenty-two million, five hundred forty-five thousand, two hundred sixty-five".