2191223 has 4 divisors (see below), whose sum is σ = 2219040. Its totient is φ = 2163408.

The previous prime is 2191199. The next prime is 2191229. The reversal of 2191223 is 3221912.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2191223 - 2⁶ = 2191159 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2191195 and 2191204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2191229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13790 + ... + 13947.

It is an arithmetic number, because the mean of its divisors is an integer number (554760).

2^2191223 is an apocalyptic number.

2191223 is a deficient number, since it is larger than the sum of its proper divisors (27817).

2191223 is an equidigital number, since it uses as much as digits as its factorization.

2191223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27816.

The product of its digits is 216, while the sum is 20.

The square root of 2191223 is about 1480.2780144284. The cubic root of 2191223 is about 129.8859552083.

The spelling of 2191223 in words is "two million, one hundred ninety-one thousand, two hundred twenty-three".