2191323 has 8 divisors (see below), whose sum is σ = 2989888. Its totient is φ = 1426824.

The previous prime is 2191291. The next prime is 2191331. The reversal of 2191323 is 3231912.

It is a happy number.

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

It is not a de Polignac number, because 2191323 - 2⁵ = 2191291 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2191323.

It is not an unprimeable number, because it can be changed into a prime (2191363) 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, 8365 + ... + 8622.

It is an arithmetic number, because the mean of its divisors is an integer number (373736).

2^2191323 is an apocalyptic number.

2191323 is a deficient number, since it is larger than the sum of its proper divisors (798565).

2191323 is a wasteful number, since it uses less digits than its factorization.

2191323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17033.

The product of its digits is 324, while the sum is 21.

The square root of 2191323 is about 1480.3117914818. The cubic root of 2191323 is about 129.8879310300.

The spelling of 2191323 in words is "two million, one hundred ninety-one thousand, three hundred twenty-three".