22565228549 has 4 divisors (see below), whose sum is σ = 22567833036. Its totient is φ = 22562624064.

The previous prime is 22565228527. The next prime is 22565228557. The reversal of 22565228549 is 94582256522.

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 8889095524 + 13676133025 = 94282^2 + 116945^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22565228549 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22565228497 and 22565228506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22565228249) 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 3 ways as a sum of consecutive naturals, for example, 1289204 + ... + 1306589.

It is an arithmetic number, because the mean of its divisors is an integer number (5641958259).

Almost surely, 2^22565228549 is an apocalyptic number.

It is an amenable number.

22565228549 is a deficient number, since it is larger than the sum of its proper divisors (2604487).

22565228549 is an equidigital number, since it uses as much as digits as its factorization.

22565228549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2604486.

The product of its digits is 3456000, while the sum is 50.

The spelling of 22565228549 in words is "twenty-two billion, five hundred sixty-five million, two hundred twenty-eight thousand, five hundred forty-nine".