22881109 has 2 divisors, whose sum is σ = 22881110. Its totient is φ = 22881108.

The previous prime is 22881101. The next prime is 22881127. The reversal of 22881109 is 90118822.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19980900 + 2900209 = 4470^2 + 1703^2 .

It is a cyclic number.

It is not a de Polignac number, because 22881109 - 2³ = 22881101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22881101) 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, 11440554 + 11440555.

It is an arithmetic number, because the mean of its divisors is an integer number (11440555).

Almost surely, 2^22881109 is an apocalyptic number.

It is an amenable number.

22881109 is a deficient number, since it is larger than the sum of its proper divisors (1).

22881109 is an equidigital number, since it uses as much as digits as its factorization.

22881109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 22881109 is about 4783.4202198845. The cubic root of 22881109 is about 283.8958364614.

The spelling of 22881109 in words is "twenty-two million, eight hundred eighty-one thousand, one hundred nine".