12228555 has 16 divisors (see below), whose sum is σ = 20021760. Its totient is φ = 6369888.

The previous prime is 12228553. The next prime is 12228563. The reversal of 12228555 is 55582221.

It is not a de Polignac number, because 12228555 - 2¹ = 12228553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12228551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8835 + ... + 10124.

It is an arithmetic number, because the mean of its divisors is an integer number (1251360).

Almost surely, 2^12228555 is an apocalyptic number.

12228555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12228555 is a deficient number, since it is larger than the sum of its proper divisors (7793205).

12228555 is a wasteful number, since it uses less digits than its factorization.

12228555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19010.

The product of its digits is 8000, while the sum is 30.

The square root of 12228555 is about 3496.9350866151. The cubic root of 12228555 is about 230.3872179264.

The spelling of 12228555 in words is "twelve million, two hundred twenty-eight thousand, five hundred fifty-five".