2191158198 has 24 divisors (see below), whose sum is σ = 4791882888. Its totient is φ = 723559392.

The previous prime is 2191158187. The next prime is 2191158199. The reversal of 2191158198 is 8918511912.

2191158198 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2191158199) 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, 566911 + ... + 570762.

It is an arithmetic number, because the mean of its divisors is an integer number (199661787).

Almost surely, 2^2191158198 is an apocalyptic number.

2191158198 is an abundant number, since it is smaller than the sum of its proper divisors (2600724690).

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

2191158198 is a wasteful number, since it uses less digits than its factorization.

2191158198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1137788 (or 1137785 counting only the distinct ones).

The product of its digits is 51840, while the sum is 45.

The square root of 2191158198 is about 46809.8087797846. The cubic root of 2191158198 is about 1298.8467480419.

The spelling of 2191158198 in words is "two billion, one hundred ninety-one million, one hundred fifty-eight thousand, one hundred ninety-eight".