12216156 has 24 divisors (see below), whose sum is σ = 28588560. Its totient is φ = 4060032.

The previous prime is 12216137. The next prime is 12216161. The reversal of 12216156 is 65161221.

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, 3360 + ... + 5976.

It is an arithmetic number, because the mean of its divisors is an integer number (1191190).

Almost surely, 2^12216156 is an apocalyptic number.

It is an amenable number.

12216156 is an abundant number, since it is smaller than the sum of its proper divisors (16372404).

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

12216156 is a wasteful number, since it uses less digits than its factorization.

12216156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3013 (or 3011 counting only the distinct ones).

The product of its digits is 720, while the sum is 24.

The square root of 12216156 is about 3495.1617988299. The cubic root of 12216156 is about 230.3093254547.

Adding to 12216156 its reverse (65161221), we get a palindrome (77377377).

The spelling of 12216156 in words is "twelve million, two hundred sixteen thousand, one hundred fifty-six".