12225228 has 12 divisors (see below), whose sum is σ = 28525560. Its totient is φ = 4075072.

The previous prime is 12225223. The next prime is 12225247. The reversal of 12225228 is 82252221.

12225228 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 12225198 and 12225207.

It is not an unprimeable number, because it can be changed into a prime (12225221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 509373 + ... + 509396.

It is an arithmetic number, because the mean of its divisors is an integer number (2377130).

Almost surely, 2^12225228 is an apocalyptic number.

It is an amenable number.

12225228 is an abundant number, since it is smaller than the sum of its proper divisors (16300332).

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

12225228 is a wasteful number, since it uses less digits than its factorization.

12225228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018776 (or 1018774 counting only the distinct ones).

The product of its digits is 1280, while the sum is 24.

The square root of 12225228 is about 3496.4593519731. The cubic root of 12225228 is about 230.3663223586.

Adding to 12225228 its reverse (82252221), we get a palindrome (94477449).

It can be divided in two parts, 12 and 225228, that multiplied together give a square (2702736 = 1644²).

The spelling of 12225228 in words is "twelve million, two hundred twenty-five thousand, two hundred twenty-eight".