12443213 has 4 divisors (see below), whose sum is σ = 12746748. Its totient is φ = 12139680.

The previous prime is 12443191. The next prime is 12443219. The reversal of 12443213 is 31234421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 896809 + 11546404 = 947^2 + 3398^2 .

It is a cyclic number.

It is not a de Polignac number, because 12443213 - 2⁶ = 12443149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12443219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151706 + ... + 151787.

It is an arithmetic number, because the mean of its divisors is an integer number (3186687).

Almost surely, 2^12443213 is an apocalyptic number.

It is an amenable number.

12443213 is a deficient number, since it is larger than the sum of its proper divisors (303535).

12443213 is an equidigital number, since it uses as much as digits as its factorization.

12443213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303534.

The product of its digits is 576, while the sum is 20.

The square root of 12443213 is about 3527.4938695907. The cubic root of 12443213 is about 231.7274655968.

Adding to 12443213 its reverse (31234421), we get a palindrome (43677634).

The spelling of 12443213 in words is "twelve million, four hundred forty-three thousand, two hundred thirteen".