2211228 has 36 divisors (see below), whose sum is σ = 5634720. Its totient is φ = 731136.

The previous prime is 2211227. The next prime is 2211233. The reversal of 2211228 is 8221122.

It is a happy number.

2211228 is digitally balanced in base 5, 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 (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 2211228.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8476 + ... + 8732.

It is an arithmetic number, because the mean of its divisors is an integer number (156520).

2^2211228 is an apocalyptic number.

It is an amenable number.

2211228 is an abundant number, since it is smaller than the sum of its proper divisors (3423492).

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

2211228 is a wasteful number, since it uses less digits than its factorization.

2211228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506 (or 501 counting only the distinct ones).

The product of its digits is 128, while the sum is 18.

The square root of 2211228 is about 1487.0198384689. The cubic root of 2211228 is about 130.2800275351.

The spelling of 2211228 in words is "two million, two hundred eleven thousand, two hundred twenty-eight".