232113221 has 2 divisors, whose sum is σ = 232113222. Its totient is φ = 232113220.

The previous prime is 232113199. The next prime is 232113227. The reversal of 232113221 is 122311232.

232113221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136562596 + 95550625 = 11686^2 + 9775^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-232113221 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 232113221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (232113227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116056610 + 116056611.

It is an arithmetic number, because the mean of its divisors is an integer number (116056611).

Almost surely, 2^232113221 is an apocalyptic number.

It is an amenable number.

232113221 is a deficient number, since it is larger than the sum of its proper divisors (1).

232113221 is an equidigital number, since it uses as much as digits as its factorization.

232113221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144, while the sum is 17.

The square root of 232113221 is about 15235.2624197944. The cubic root of 232113221 is about 614.5633060028.

Adding to 232113221 its reverse (122311232), we get a palindrome (354424453).

The spelling of 232113221 in words is "two hundred thirty-two million, one hundred thirteen thousand, two hundred twenty-one".