12205218 has 16 divisors (see below), whose sum is σ = 25846560. Its totient is φ = 3829056.

The previous prime is 12205217. The next prime is 12205229. The reversal of 12205218 is 81250221.

It is a happy number.

12205218 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 12205194 and 12205203.

It is not an unprimeable number, because it can be changed into a prime (12205213) 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, 59728 + ... + 59931.

It is an arithmetic number, because the mean of its divisors is an integer number (1615410).

Almost surely, 2^12205218 is an apocalyptic number.

12205218 is an abundant number, since it is smaller than the sum of its proper divisors (13641342).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12205218 is a wasteful number, since it uses less digits than its factorization.

12205218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119681.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 12205218 is about 3493.5967139898. The cubic root of 12205218 is about 230.2405674475.

Adding to 12205218 its reverse (81250221), we get a palindrome (93455439).

The spelling of 12205218 in words is "twelve million, two hundred five thousand, two hundred eighteen".