12213636 has 24 divisors (see below), whose sum is σ = 28561344. Its totient is φ = 4062240.

The previous prime is 12213629. The next prime is 12213647. The reversal of 12213636 is 63631221.

It is a happy number.

12213636 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

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, 6766 + ... + 8378.

It is an arithmetic number, because the mean of its divisors is an integer number (1190056).

Almost surely, 2^12213636 is an apocalyptic number.

It is an amenable number.

12213636 is an abundant number, since it is smaller than the sum of its proper divisors (16347708).

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

12213636 is a wasteful number, since it uses less digits than its factorization.

12213636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2251 (or 2249 counting only the distinct ones).

The product of its digits is 1296, while the sum is 24.

The square root of 12213636 is about 3494.8012819043. The cubic root of 12213636 is about 230.2934879738.

Adding to 12213636 its reverse (63631221), we get a palindrome (75844857).

The spelling of 12213636 in words is "twelve million, two hundred thirteen thousand, six hundred thirty-six".