23243221 has 2 divisors, whose sum is σ = 23243222. Its totient is φ = 23243220.

The previous prime is 23243201. The next prime is 23243243. The reversal of 23243221 is 12234232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12680721 + 10562500 = 3561^2 + 3250^2 .

It is a cyclic number.

It is not a de Polignac number, because 23243221 - 2⁷ = 23243093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23243201) 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, 11621610 + 11621611.

It is an arithmetic number, because the mean of its divisors is an integer number (11621611).

Almost surely, 2^23243221 is an apocalyptic number.

It is an amenable number.

23243221 is a deficient number, since it is larger than the sum of its proper divisors (1).

23243221 is an equidigital number, since it uses as much as digits as its factorization.

23243221 is an odious number, because the sum of its binary digits is odd.

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

The square root of 23243221 is about 4821.1223796954. The cubic root of 23243221 is about 285.3856316573.

Adding to 23243221 its reverse (12234232), we get a palindrome (35477453).

The spelling of 23243221 in words is "twenty-three million, two hundred forty-three thousand, two hundred twenty-one".