22644065 has 4 divisors (see below), whose sum is σ = 27172884. Its totient is φ = 18115248.

The previous prime is 22644053. The next prime is 22644071. The reversal of 22644065 is 56044622.

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 10316944 + 12327121 = 3212^2 + 3511^2 .

It is a cyclic number.

It is not a de Polignac number, because 22644065 - 2⁴ = 22644049 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2264402 + ... + 2264411.

It is an arithmetic number, because the mean of its divisors is an integer number (6793221).

Almost surely, 2^22644065 is an apocalyptic number.

It is an amenable number.

22644065 is a deficient number, since it is larger than the sum of its proper divisors (4528819).

22644065 is an equidigital number, since it uses as much as digits as its factorization.

22644065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4528818.

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 22644065 is about 4758.5780439119. The cubic root of 22644065 is about 282.9120621446.

Adding to 22644065 its reverse (56044622), we get a palindrome (78688687).

The spelling of 22644065 in words is "twenty-two million, six hundred forty-four thousand, sixty-five".