11311223 has 16 divisors (see below), whose sum is σ = 14307840. Its totient is φ = 8685600.

The previous prime is 11311219. The next prime is 11311231. The reversal of 11311223 is 32211311.

It is not a de Polignac number, because 11311223 - 2² = 11311219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11311198 and 11311207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11311253) 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 15 ways as a sum of consecutive naturals, for example, 4433 + ... + 6501.

It is an arithmetic number, because the mean of its divisors is an integer number (894240).

Almost surely, 2^11311223 is an apocalyptic number.

11311223 is a deficient number, since it is larger than the sum of its proper divisors (2996617).

11311223 is a wasteful number, since it uses less digits than its factorization.

11311223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2158.

The product of its digits is 36, while the sum is 14.

The square root of 11311223 is about 3363.2161690858. The cubic root of 11311223 is about 224.4759689424.

Adding to 11311223 its reverse (32211311), we get a palindrome (43522534).

The spelling of 11311223 in words is "eleven million, three hundred eleven thousand, two hundred twenty-three".