22155589 has 2 divisors, whose sum is σ = 22155590. Its totient is φ = 22155588.

The previous prime is 22155587. The next prime is 22155611. The reversal of 22155589 is 98555122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16467364 + 5688225 = 4058^2 + 2385^2 .

It is a cyclic number.

It is not a de Polignac number, because 22155589 - 2¹ = 22155587 is a prime.

Together with 22155587, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22155583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11077794 + 11077795.

It is an arithmetic number, because the mean of its divisors is an integer number (11077795).

Almost surely, 2^22155589 is an apocalyptic number.

It is an amenable number.

22155589 is a deficient number, since it is larger than the sum of its proper divisors (1).

22155589 is an equidigital number, since it uses as much as digits as its factorization.

22155589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36000, while the sum is 37.

The square root of 22155589 is about 4706.9723814784. The cubic root of 22155589 is about 280.8629372551.

The spelling of 22155589 in words is "twenty-two million, one hundred fifty-five thousand, five hundred eighty-nine".