22155569 has 2 divisors, whose sum is σ = 22155570. Its totient is φ = 22155568.

The previous prime is 22155559. The next prime is 22155583. The reversal of 22155569 is 96555122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15840400 + 6315169 = 3980^2 + 2513^2 .

It is a cyclic number.

It is not a de Polignac number, because 22155569 - 2²⁰ = 21106993 is a prime.

It is a super-2 number, since 2×22155569² = 981738475427522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (22155559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11077784 + 11077785.

It is an arithmetic number, because the mean of its divisors is an integer number (11077785).

Almost surely, 2^22155569 is an apocalyptic number.

It is an amenable number.

22155569 is a deficient number, since it is larger than the sum of its proper divisors (1).

22155569 is an equidigital number, since it uses as much as digits as its factorization.

22155569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27000, while the sum is 35.

The square root of 22155569 is about 4706.9702569700. The cubic root of 22155569 is about 280.8628527428.

The spelling of 22155569 in words is "twenty-two million, one hundred fifty-five thousand, five hundred sixty-nine".