22621589 has 4 divisors (see below), whose sum is σ = 22716480. Its totient is φ = 22526700.

The previous prime is 22621559. The next prime is 22621591. The reversal of 22621589 is 98512622.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 22621589 - 2¹² = 22617493 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 (22621519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47087 + ... + 47564.

It is an arithmetic number, because the mean of its divisors is an integer number (5679120).

Almost surely, 2^22621589 is an apocalyptic number.

It is an amenable number.

22621589 is a deficient number, since it is larger than the sum of its proper divisors (94891).

22621589 is an equidigital number, since it uses as much as digits as its factorization.

22621589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94890.

The product of its digits is 17280, while the sum is 35.

The square root of 22621589 is about 4756.2158277353. The cubic root of 22621589 is about 282.8184270646.

The spelling of 22621589 in words is "twenty-two million, six hundred twenty-one thousand, five hundred eighty-nine".