12213208 has 32 divisors (see below), whose sum is σ = 27712800. Its totient is φ = 4925952.

The previous prime is 12213199. The next prime is 12213221. The reversal of 12213208 is 80231221.

It is a plaindrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5463 + ... + 7366.

It is an arithmetic number, because the mean of its divisors is an integer number (866025).

Almost surely, 2^12213208 is an apocalyptic number.

It is an amenable number.

12213208 is an abundant number, since it is smaller than the sum of its proper divisors (15499592).

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

12213208 is a wasteful number, since it uses less digits than its factorization.

12213208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12859 (or 12855 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 12213208 is about 3494.7400475572. The cubic root of 12213208 is about 230.2907978995.

Adding to 12213208 its reverse (80231221), we get a palindrome (92444429).

It can be divided in two parts, 12213 and 208, that added together give a palindrome (12421).

The spelling of 12213208 in words is "twelve million, two hundred thirteen thousand, two hundred eight".