22298581 has 2 divisors, whose sum is σ = 22298582. Its totient is φ = 22298580.

The previous prime is 22298561. The next prime is 22298587. The reversal of 22298581 is 18589222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16851025 + 5447556 = 4105^2 + 2334^2 .

It is a cyclic number.

It is not a de Polignac number, because 22298581 - 2⁷ = 22298453 is a prime.

It is a super-2 number, since 2×22298581² = 994453429227122, which contains 22 as substring.

It is a zygodrome in base 4.

It is a self number, because there is not a number n which added to its sum of digits gives 22298581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22298587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11149290 + 11149291.

It is an arithmetic number, because the mean of its divisors is an integer number (11149291).

Almost surely, 2^22298581 is an apocalyptic number.

It is an amenable number.

22298581 is a deficient number, since it is larger than the sum of its proper divisors (1).

22298581 is an equidigital number, since it uses as much as digits as its factorization.

22298581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23040, while the sum is 37.

The square root of 22298581 is about 4722.1373338775. The cubic root of 22298581 is about 281.4658710742.

The spelling of 22298581 in words is "twenty-two million, two hundred ninety-eight thousand, five hundred eighty-one".