22216565 has 8 divisors (see below), whose sum is σ = 30468480. Its totient is φ = 15234192.

The previous prime is 22216561. The next prime is 22216583. The reversal of 22216565 is 56561222.

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

It is a cyclic number.

It is not a de Polignac number, because 22216565 - 2² = 22216561 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22216561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 317345 + ... + 317414.

It is an arithmetic number, because the mean of its divisors is an integer number (3808560).

Almost surely, 2^22216565 is an apocalyptic number.

It is an amenable number.

22216565 is a deficient number, since it is larger than the sum of its proper divisors (8251915).

22216565 is an equidigital number, since it uses as much as digits as its factorization.

22216565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634771.

The product of its digits is 7200, while the sum is 29.

The square root of 22216565 is about 4713.4451306873. The cubic root of 22216565 is about 281.1203623124.

Adding to 22216565 its reverse (56561222), we get a palindrome (78777787).

The spelling of 22216565 in words is "twenty-two million, two hundred sixteen thousand, five hundred sixty-five".