22665109 has 2 divisors, whose sum is σ = 22665110. Its totient is φ = 22665108.

The previous prime is 22665103. The next prime is 22665121. The reversal of 22665109 is 90156622.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17388900 + 5276209 = 4170^2 + 2297^2 .

It is a cyclic number.

It is not a de Polignac number, because 22665109 - 2³ = 22665101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22665101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11332554 + 11332555.

It is an arithmetic number, because the mean of its divisors is an integer number (11332555).

Almost surely, 2^22665109 is an apocalyptic number.

It is an amenable number.

22665109 is a deficient number, since it is larger than the sum of its proper divisors (1).

22665109 is an equidigital number, since it uses as much as digits as its factorization.

22665109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 22665109 is about 4760.7886951639. The cubic root of 22665109 is about 282.9996753608. Note that the first 3 decimals are identical.

The spelling of 22665109 in words is "twenty-two million, six hundred sixty-five thousand, one hundred nine".