22165565 has 8 divisors (see below), whose sum is σ = 26919648. Its totient is φ = 17518480.

The previous prime is 22165547. The next prime is 22165579. The reversal of 22165565 is 56556122.

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

It is not a de Polignac number, because 22165565 - 2¹⁸ = 21903421 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 26291 + ... + 27120.

It is an arithmetic number, because the mean of its divisors is an integer number (3364956).

Almost surely, 2^22165565 is an apocalyptic number.

It is an amenable number.

22165565 is a deficient number, since it is larger than the sum of its proper divisors (4754083).

22165565 is an equidigital number, since it uses as much as digits as its factorization.

22165565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53499.

The product of its digits is 18000, while the sum is 32.

The square root of 22165565 is about 4708.0319667564. The cubic root of 22165565 is about 280.9050856604.

The spelling of 22165565 in words is "twenty-two million, one hundred sixty-five thousand, five hundred sixty-five".