12182218 has 4 divisors (see below), whose sum is σ = 18273330. Its totient is φ = 6091108.

The previous prime is 12182189. The next prime is 12182243. The reversal of 12182218 is 81228121.

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

It can be written as a sum of positive squares in only one way, i.e., 6692569 + 5489649 = 2587^2 + 2343^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12182192 and 12182201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3045553 + ... + 3045556.

Almost surely, 2^12182218 is an apocalyptic number.

12182218 is a deficient number, since it is larger than the sum of its proper divisors (6091112).

12182218 is an equidigital number, since it uses as much as digits as its factorization.

12182218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6091111.

The product of its digits is 512, while the sum is 25.

The square root of 12182218 is about 3490.3034252053. The cubic root of 12182218 is about 230.0958516680.

The spelling of 12182218 in words is "twelve million, one hundred eighty-two thousand, two hundred eighteen".