12218433 has 8 divisors (see below), whose sum is σ = 16816896. Its totient is φ = 7882800.

The previous prime is 12218417. The next prime is 12218443. The reversal of 12218433 is 33481221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12218433 - 2⁴ = 12218417 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (12218443) 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, 65598 + ... + 65783.

It is an arithmetic number, because the mean of its divisors is an integer number (2102112).

Almost surely, 2^12218433 is an apocalyptic number.

It is an amenable number.

12218433 is a deficient number, since it is larger than the sum of its proper divisors (4598463).

12218433 is a wasteful number, since it uses less digits than its factorization.

12218433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131415.

The product of its digits is 1152, while the sum is 24.

The square root of 12218433 is about 3495.4875196459. The cubic root of 12218433 is about 230.3236338769.

Multiplying 12218433 by its sum of digits (24), we get a palindrome (293242392).

Adding to 12218433 its reverse (33481221), we get a palindrome (45699654).

The spelling of 12218433 in words is "twelve million, two hundred eighteen thousand, four hundred thirty-three".