11811223 has 4 divisors (see below), whose sum is σ = 11819808. Its totient is φ = 11802640.

The previous prime is 11811221. The next prime is 11811227. The reversal of 11811223 is 32211811.

11811223 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 11811223 - 2¹ = 11811221 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 11811223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11811221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1711 + ... + 5152.

It is an arithmetic number, because the mean of its divisors is an integer number (2954952).

Almost surely, 2^11811223 is an apocalyptic number.

11811223 is a deficient number, since it is larger than the sum of its proper divisors (8585).

11811223 is an equidigital number, since it uses as much as digits as its factorization.

11811223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8584.

The product of its digits is 96, while the sum is 19.

The square root of 11811223 is about 3436.7459900318. The cubic root of 11811223 is about 227.7359657714.

The spelling of 11811223 in words is "eleven million, eight hundred eleven thousand, two hundred twenty-three".