23423221 has 2 divisors, whose sum is σ = 23423222. Its totient is φ = 23423220.

The previous prime is 23423209. The next prime is 23423227. The reversal of 23423221 is 12232432.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15888196 + 7535025 = 3986^2 + 2745^2 .

It is a cyclic number.

It is not a de Polignac number, because 23423221 - 2¹¹ = 23421173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23423227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11711610 + 11711611.

It is an arithmetic number, because the mean of its divisors is an integer number (11711611).

Almost surely, 2^23423221 is an apocalyptic number.

It is an amenable number.

23423221 is a deficient number, since it is larger than the sum of its proper divisors (1).

23423221 is an equidigital number, since it uses as much as digits as its factorization.

23423221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 19.

The square root of 23423221 is about 4839.7542292972. The cubic root of 23423221 is about 286.1204319443.

Adding to 23423221 its reverse (12232432), we get a palindrome (35655653).

The spelling of 23423221 in words is "twenty-three million, four hundred twenty-three thousand, two hundred twenty-one".