23221369 has 2 divisors, whose sum is σ = 23221370. Its totient is φ = 23221368.

The previous prime is 23221361. The next prime is 23221379. The reversal of 23221369 is 96312232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19686969 + 3534400 = 4437^2 + 1880^2 .

It is a cyclic number.

It is not a de Polignac number, because 23221369 - 2³ = 23221361 is a prime.

It is a super-2 number, since 2×23221369² = 1078463956468322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23221361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11610684 + 11610685.

It is an arithmetic number, because the mean of its divisors is an integer number (11610685).

Almost surely, 2^23221369 is an apocalyptic number.

It is an amenable number.

23221369 is a deficient number, since it is larger than the sum of its proper divisors (1).

23221369 is an equidigital number, since it uses as much as digits as its factorization.

23221369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 28.

The square root of 23221369 is about 4818.8555695310. The cubic root of 23221369 is about 285.2961689824.

The spelling of 23221369 in words is "twenty-three million, two hundred twenty-one thousand, three hundred sixty-nine".