2191030200 has 144 divisors (see below), whose sum is σ = 7377318000. Its totient is φ = 582758400.

The previous prime is 2191030187. The next prime is 2191030211. The reversal of 2191030200 is 20301912.

It is a happy number.

It is a super-2 number, since 2×2191030200² = 9601226674624080000, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 806845 + ... + 809555.

It is an arithmetic number, because the mean of its divisors is an integer number (51231375).

Almost surely, 2^2191030200 is an apocalyptic number.

2191030200 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 2191030200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3688659000).

2191030200 is an abundant number, since it is smaller than the sum of its proper divisors (5186287800).

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

2191030200 is a wasteful number, since it uses less digits than its factorization.

2191030200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3182 (or 3170 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 2191030200 is about 46808.4415463707. The cubic root of 2191030200 is about 1298.8214565433.

The spelling of 2191030200 in words is "two billion, one hundred ninety-one million, thirty thousand, two hundred".