12216772 has 48 divisors (see below), whose sum is σ = 24393600. Its totient is φ = 5322240.

The previous prime is 12216767. The next prime is 12216781. The reversal of 12216772 is 27761221.

12216772 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 12216772.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50572 + ... + 50812.

It is an arithmetic number, because the mean of its divisors is an integer number (508200).

Almost surely, 2^12216772 is an apocalyptic number.

12216772 is the 1748-th decagonal number.

It is an amenable number.

12216772 is a deficient number, since it is larger than the sum of its proper divisors (12176828).

12216772 is a wasteful number, since it uses less digits than its factorization.

12216772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316 (or 314 counting only the distinct ones).

The product of its digits is 2352, while the sum is 28.

The square root of 12216772 is about 3495.2499195337. The cubic root of 12216772 is about 230.3131965076.

Adding to 12216772 its reverse (27761221), we get a palindrome (39977993).

The spelling of 12216772 in words is "twelve million, two hundred sixteen thousand, seven hundred seventy-two".