12218323 has 4 divisors (see below), whose sum is σ = 13158208. Its totient is φ = 11278440.

The previous prime is 12218299. The next prime is 12218329. The reversal of 12218323 is 32381221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32381221 = 569 ⋅56909.

It is a cyclic number.

It is not a de Polignac number, because 12218323 - 2⁹ = 12217811 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12218294 and 12218303.

It is not an unprimeable number, because it can be changed into a prime (12218329) 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, 469923 + ... + 469948.

It is an arithmetic number, because the mean of its divisors is an integer number (3289552).

Almost surely, 2^12218323 is an apocalyptic number.

12218323 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12218323 is a deficient number, since it is larger than the sum of its proper divisors (939885).

12218323 is an equidigital number, since it uses as much as digits as its factorization.

12218323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939884.

The product of its digits is 576, while the sum is 22.

The square root of 12218323 is about 3495.4717850385. The cubic root of 12218323 is about 230.3229426897.

Adding to 12218323 its reverse (32381221), we get a palindrome (44599544).

The spelling of 12218323 in words is "twelve million, two hundred eighteen thousand, three hundred twenty-three".