12443218 has 16 divisors (see below), whose sum is σ = 20100960. Its totient is φ = 5755456.

The previous prime is 12443191. The next prime is 12443219. The reversal of 12443218 is 81234421.

It is a junction number, because it is equal to n+sod(n) for n = 12443192 and 12443201.

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 7 ways as a sum of consecutive naturals, for example, 1096 + ... + 5107.

It is an arithmetic number, because the mean of its divisors is an integer number (1256310).

Almost surely, 2^12443218 is an apocalyptic number.

12443218 is a deficient number, since it is larger than the sum of its proper divisors (7657742).

12443218 is a wasteful number, since it uses less digits than its factorization.

12443218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6281.

The product of its digits is 1536, while the sum is 25.

The square root of 12443218 is about 3527.4945783091. The cubic root of 12443218 is about 231.7274966348.

Adding to 12443218 its reverse (81234421), we get a palindrome (93677639).

The spelling of 12443218 in words is "twelve million, four hundred forty-three thousand, two hundred eighteen".