211144228 has 12 divisors (see below), whose sum is σ = 372323952. Its totient is φ = 104765960.

The previous prime is 211144217. The next prime is 211144247. The reversal of 211144228 is 822441112.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 200950 + ... + 201997.

It is an arithmetic number, because the mean of its divisors is an integer number (31026996).

Almost surely, 2^211144228 is an apocalyptic number.

It is an amenable number.

211144228 is a deficient number, since it is larger than the sum of its proper divisors (161179724).

211144228 is a wasteful number, since it uses less digits than its factorization.

211144228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403082 (or 403080 counting only the distinct ones).

The product of its digits is 1024, while the sum is 25.

The square root of 211144228 is about 14530.8027307510. The cubic root of 211144228 is about 595.4697963246.

The spelling of 211144228 in words is "two hundred eleven million, one hundred forty-four thousand, two hundred twenty-eight".