23221117 has 2 divisors, whose sum is σ = 23221118. Its totient is φ = 23221116.

The previous prime is 23221109. The next prime is 23221123. The reversal of 23221117 is 71112232.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15319396 + 7901721 = 3914^2 + 2811^2 .

It is a cyclic number.

It is not a de Polignac number, because 23221117 - 2³ = 23221109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23221094 and 23221103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23221147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11610558 + 11610559.

It is an arithmetic number, because the mean of its divisors is an integer number (11610559).

Almost surely, 2^23221117 is an apocalyptic number.

It is an amenable number.

23221117 is a deficient number, since it is larger than the sum of its proper divisors (1).

23221117 is an equidigital number, since it uses as much as digits as its factorization.

23221117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 168, while the sum is 19.

The square root of 23221117 is about 4818.8294221730. The cubic root of 23221117 is about 285.2951369603.

Adding to 23221117 its reverse (71112232), we get a palindrome (94333349).

The spelling of 23221117 in words is "twenty-three million, two hundred twenty-one thousand, one hundred seventeen".