2191267198 has 16 divisors (see below), whose sum is σ = 3356640000. Its totient is φ = 1072543192.

The previous prime is 2191267189. The next prime is 2191267213. The reversal of 2191267198 is 8917621912.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10648 + ... + 67051.

It is an arithmetic number, because the mean of its divisors is an integer number (209790000).

Almost surely, 2^2191267198 is an apocalyptic number.

2191267198 is a deficient number, since it is larger than the sum of its proper divisors (1165372802).

2191267198 is a wasteful number, since it uses less digits than its factorization.

2191267198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77999.

The product of its digits is 108864, while the sum is 46.

The square root of 2191267198 is about 46810.9730511982. The cubic root of 2191267198 is about 1298.8682848937.

The spelling of 2191267198 in words is "two billion, one hundred ninety-one million, two hundred sixty-seven thousand, one hundred ninety-eight".