2191840343 has 24 divisors (see below), whose sum is σ = 2778763680. Its totient is φ = 1692187200.

The previous prime is 2191840267. The next prime is 2191840351. The reversal of 2191840343 is 3430481912.

It is not a de Polignac number, because 2191840343 - 2¹⁶ = 2191774807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2191840363) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 80453 + ... + 104193.

It is an arithmetic number, because the mean of its divisors is an integer number (115781820).

Almost surely, 2^2191840343 is an apocalyptic number.

2191840343 is a deficient number, since it is larger than the sum of its proper divisors (586923337).

2191840343 is a wasteful number, since it uses less digits than its factorization.

2191840343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23879 (or 23868 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 2191840343 is about 46817.0945595730. The cubic root of 2191840343 is about 1298.9815184553.

The spelling of 2191840343 in words is "two billion, one hundred ninety-one million, eight hundred forty thousand, three hundred forty-three".