12227556 has 48 divisors (see below), whose sum is σ = 32961600. Its totient is φ = 3486720.

The previous prime is 12227533. The next prime is 12227557. The reversal of 12227556 is 65572221.

It is not an unprimeable number, because it can be changed into a prime (12227557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 481 + ... + 4968.

It is an arithmetic number, because the mean of its divisors is an integer number (686700).

Almost surely, 2^12227556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12227556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16480800).

12227556 is an abundant number, since it is smaller than the sum of its proper divisors (20734044).

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

12227556 is a wasteful number, since it uses less digits than its factorization.

12227556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5484 (or 5482 counting only the distinct ones).

The product of its digits is 8400, while the sum is 30.

The square root of 12227556 is about 3496.7922443291. The cubic root of 12227556 is about 230.3809440017.

Adding to 12227556 its reverse (65572221), we get a palindrome (77799777).

It can be divided in two parts, 1222 and 7556, that added together give a palindrome (8778).

The spelling of 12227556 in words is "twelve million, two hundred twenty-seven thousand, five hundred fifty-six".