23424221 has 2 divisors, whose sum is σ = 23424222. Its totient is φ = 23424220.

The previous prime is 23424197. The next prime is 23424227. The reversal of 23424221 is 12242432.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15100996 + 8323225 = 3886^2 + 2885^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23424221 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 23424193 and 23424202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23424227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11712110 + 11712111.

It is an arithmetic number, because the mean of its divisors is an integer number (11712111).

Almost surely, 2^23424221 is an apocalyptic number.

It is an amenable number.

23424221 is a deficient number, since it is larger than the sum of its proper divisors (1).

23424221 is an equidigital number, since it uses as much as digits as its factorization.

23424221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 768, while the sum is 20.

The square root of 23424221 is about 4839.8575392257. The cubic root of 23424221 is about 286.1245036354.

Adding to 23424221 its reverse (12242432), we get a palindrome (35666653).

The spelling of 23424221 in words is "twenty-three million, four hundred twenty-four thousand, two hundred twenty-one".