2191911363 has 6 divisors (see below), whose sum is σ = 3166094204. Its totient is φ = 1461274236.

The previous prime is 2191911349. The next prime is 2191911409. The reversal of 2191911363 is 3631191912.

It is not a de Polignac number, because 2191911363 - 2⁴ = 2191911347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2191901363) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 121772845 + ... + 121772862.

Almost surely, 2^2191911363 is an apocalyptic number.

2191911363 is a deficient number, since it is larger than the sum of its proper divisors (974182841).

2191911363 is a wasteful number, since it uses less digits than its factorization.

2191911363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243545713 (or 243545710 counting only the distinct ones).

The product of its digits is 8748, while the sum is 36.

The square root of 2191911363 is about 46817.8530370627. The cubic root of 2191911363 is about 1298.9955481680.

The spelling of 2191911363 in words is "two billion, one hundred ninety-one million, nine hundred eleven thousand, three hundred sixty-three".