12225556 has 12 divisors (see below), whose sum is σ = 24451168. Its totient is φ = 5239512.

The previous prime is 12225553. The next prime is 12225611. The reversal of 12225556 is 65552221.

12225556 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 436627 = 12225556 / (1 + 2 + 2 + 2 + 5 + 5 + 5 + 6).

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12225553) 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, 218286 + ... + 218341.

Almost surely, 2^12225556 is an apocalyptic number.

It is an amenable number.

12225556 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12225556 is a wasteful number, since it uses less digits than its factorization.

12225556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436638 (or 436636 counting only the distinct ones).

The product of its digits is 6000, while the sum is 28.

The square root of 12225556 is about 3496.5062562507. The cubic root of 12225556 is about 230.3683825650.

Adding to 12225556 its reverse (65552221), we get a palindrome (77777777).

The spelling of 12225556 in words is "twelve million, two hundred twenty-five thousand, five hundred fifty-six".