2191371411 has 8 divisors (see below), whose sum is σ = 2944835584. Its totient is φ = 1449410760.

The previous prime is 2191371407. The next prime is 2191371419. The reversal of 2191371411 is 1141731912.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2191371411 - 2² = 2191371407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2191371419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2875435 + ... + 2876196.

It is an arithmetic number, because the mean of its divisors is an integer number (368104448).

Almost surely, 2^2191371411 is an apocalyptic number.

2191371411 is a deficient number, since it is larger than the sum of its proper divisors (753464173).

2191371411 is a wasteful number, since it uses less digits than its factorization.

2191371411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5751761.

The product of its digits is 1512, while the sum is 30.

The square root of 2191371411 is about 46812.0861637249. The cubic root of 2191371411 is about 1298.8888752344. Note that the first 4 decimals are identical.

The spelling of 2191371411 in words is "two billion, one hundred ninety-one million, three hundred seventy-one thousand, four hundred eleven".