22105565 has 4 divisors (see below), whose sum is σ = 26526684. Its totient is φ = 17684448.

The previous prime is 22105561. The next prime is 22105583. The reversal of 22105565 is 56550122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56550122 = 2 ⋅28275061.

It can be written as a sum of positive squares in 2 ways, for example, as 7252249 + 14853316 = 2693^2 + 3854^2 .

It is a cyclic number.

It is not a de Polignac number, because 22105565 - 2² = 22105561 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22105561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2210552 + ... + 2210561.

It is an arithmetic number, because the mean of its divisors is an integer number (6631671).

Almost surely, 2^22105565 is an apocalyptic number.

It is an amenable number.

22105565 is a deficient number, since it is larger than the sum of its proper divisors (4421119).

22105565 is an equidigital number, since it uses as much as digits as its factorization.

22105565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4421118.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 22105565 is about 4701.6555594811. The cubic root of 22105565 is about 280.6513958237.

Adding to 22105565 its reverse (56550122), we get a palindrome (78655687).

The spelling of 22105565 in words is "twenty-two million, one hundred five thousand, five hundred sixty-five".