232021213 has 2 divisors, whose sum is σ = 232021214. Its totient is φ = 232021212.

The previous prime is 232021189. The next prime is 232021241. The reversal of 232021213 is 312120232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202720644 + 29300569 = 14238^2 + 5413^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-232021213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (232021243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116010606 + 116010607.

It is an arithmetic number, because the mean of its divisors is an integer number (116010607).

Almost surely, 2^232021213 is an apocalyptic number.

It is an amenable number.

232021213 is a deficient number, since it is larger than the sum of its proper divisors (1).

232021213 is an equidigital number, since it uses as much as digits as its factorization.

232021213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 232021213 is about 15232.2425466508. The cubic root of 232021213 is about 614.4820924563.

Adding to 232021213 its reverse (312120232), we get a palindrome (544141445).

The spelling of 232021213 in words is "two hundred thirty-two million, twenty-one thousand, two hundred thirteen".