23232221 has 2 divisors, whose sum is σ = 23232222. Its totient is φ = 23232220.

The previous prime is 23232211. The next prime is 23232239. The reversal of 23232221 is 12223232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17131321 + 6100900 = 4139^2 + 2470^2 .

It is a cyclic number.

It is not a de Polignac number, because 23232221 - 2¹⁴ = 23215837 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23232221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23232211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11616110 + 11616111.

It is an arithmetic number, because the mean of its divisors is an integer number (11616111).

Almost surely, 2^23232221 is an apocalyptic number.

It is an amenable number.

23232221 is a deficient number, since it is larger than the sum of its proper divisors (1).

23232221 is an equidigital number, since it uses as much as digits as its factorization.

23232221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 17.

The square root of 23232221 is about 4819.9814314995. The cubic root of 23232221 is about 285.3406043738.

Adding to 23232221 its reverse (12223232), we get a palindrome (35455453).

The spelling of 23232221 in words is "twenty-three million, two hundred thirty-two thousand, two hundred twenty-one".