12243213 has 12 divisors (see below), whose sum is σ = 18725148. Its totient is φ = 7681920.

The previous prime is 12243197. The next prime is 12243221. The reversal of 12243213 is 31234221.

12243213 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 4052169 + 8191044 = 2013^2 + 2862^2 .

It is not a de Polignac number, because 12243213 - 2⁴ = 12243197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12243113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39858 + ... + 40163.

It is an arithmetic number, because the mean of its divisors is an integer number (1560429).

Almost surely, 2^12243213 is an apocalyptic number.

It is an amenable number.

12243213 is a deficient number, since it is larger than the sum of its proper divisors (6481935).

12243213 is a wasteful number, since it uses less digits than its factorization.

12243213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80044 (or 80041 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 12243213 is about 3499.0302942387. The cubic root of 12243213 is about 230.4792339067.

Adding to 12243213 its reverse (31234221), we get a palindrome (43477434).

The spelling of 12243213 in words is "twelve million, two hundred forty-three thousand, two hundred thirteen".