2191228200 has 672 divisors, whose sum is σ = 9270388800. Its totient is φ = 470292480.

The previous prime is 2191228189. The next prime is 2191228201. The reversal of 2191228200 is 28221912.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (2191228201) by changing a digit.

It is a polite number, since it can be written in 167 ways as a sum of consecutive naturals, for example, 19391344 + ... + 19391456.

Almost surely, 2^2191228200 is an apocalyptic number.

2191228200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2191228200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4635194400).

2191228200 is an abundant number, since it is smaller than the sum of its proper divisors (7079160600).

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

2191228200 is a wasteful number, since it uses less digits than its factorization.

2191228200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 2191228200 is about 46810.5565017123. The cubic root of 2191228200 is about 1298.8605795249.

The spelling of 2191228200 in words is "two billion, one hundred ninety-one million, two hundred twenty-eight thousand, two hundred".