12218313 has 12 divisors (see below), whose sum is σ = 17032400. Its totient is φ = 7790376.

The previous prime is 12218299. The next prime is 12218329. The reversal of 12218313 is 31381221.

It is not a de Polignac number, because 12218313 - 2⁹ = 12217801 is a prime.

It is a Duffinian number.

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 12218313.

It is not an unprimeable number, because it can be changed into a prime (12218333) 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, 2263 + ... + 5436.

Almost surely, 2^12218313 is an apocalyptic number.

It is an amenable number.

12218313 is a deficient number, since it is larger than the sum of its proper divisors (4814087).

12218313 is an equidigital number, since it uses as much as digits as its factorization.

12218313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7748 (or 7725 counting only the distinct ones).

The product of its digits is 288, while the sum is 21.

The square root of 12218313 is about 3495.4703546161. The cubic root of 12218313 is about 230.3228798543.

Adding to 12218313 its reverse (31381221), we get a palindrome (43599534).

The spelling of 12218313 in words is "twelve million, two hundred eighteen thousand, three hundred thirteen".