22540369 has 2 divisors, whose sum is σ = 22540370. Its totient is φ = 22540368.

The previous prime is 22540361. The next prime is 22540373. The reversal of 22540369 is 96304522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14922769 + 7617600 = 3863^2 + 2760^2 .

It is a cyclic number.

It is not a de Polignac number, because 22540369 - 2³ = 22540361 is a prime.

It is a super-2 number, since 2×22540369² = 1016136469312322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22540369.

It is not a weakly prime, because it can be changed into another prime (22540361) 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 as a sum of consecutive naturals, namely, 11270184 + 11270185.

It is an arithmetic number, because the mean of its divisors is an integer number (11270185).

Almost surely, 2^22540369 is an apocalyptic number.

It is an amenable number.

22540369 is a deficient number, since it is larger than the sum of its proper divisors (1).

22540369 is an equidigital number, since it uses as much as digits as its factorization.

22540369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 22540369 is about 4747.6698495157. The cubic root of 22540369 is about 282.4795463825.

The spelling of 22540369 in words is "twenty-two million, five hundred forty thousand, three hundred sixty-nine".