22665589 has 4 divisors (see below), whose sum is σ = 22693824. Its totient is φ = 22637356.

The previous prime is 22665583. The next prime is 22665593. The reversal of 22665589 is 98556622.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98556622 = 2 ⋅49278311.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22665589 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 (22665583) 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, 12877 + ... + 14530.

It is an arithmetic number, because the mean of its divisors is an integer number (5673456).

Almost surely, 2^22665589 is an apocalyptic number.

It is an amenable number.

22665589 is a deficient number, since it is larger than the sum of its proper divisors (28235).

22665589 is an equidigital number, since it uses as much as digits as its factorization.

22665589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28234.

The product of its digits is 259200, while the sum is 43.

The square root of 22665589 is about 4760.8391067122. The cubic root of 22665589 is about 283.0016731287.

The spelling of 22665589 in words is "twenty-two million, six hundred sixty-five thousand, five hundred eighty-nine".