23221109 has 2 divisors, whose sum is σ = 23221110. Its totient is φ = 23221108.

The previous prime is 23221103. The next prime is 23221117. The reversal of 23221109 is 90112232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14938225 + 8282884 = 3865^2 + 2878^2 .

It is a cyclic number.

It is not a de Polignac number, because 23221109 - 2⁸ = 23220853 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is equal to p_1461260 and since 23221109 and 1461260 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23221103) 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, 11610554 + 11610555.

It is an arithmetic number, because the mean of its divisors is an integer number (11610555).

Almost surely, 2^23221109 is an apocalyptic number.

It is an amenable number.

23221109 is a deficient number, since it is larger than the sum of its proper divisors (1).

23221109 is an equidigital number, since it uses as much as digits as its factorization.

23221109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 23221109 is about 4818.8285920958. The cubic root of 23221109 is about 285.2951041976.

The spelling of 23221109 in words is "twenty-three million, two hundred twenty-one thousand, one hundred nine".