12311223 has 8 divisors (see below), whose sum is σ = 16566000. Its totient is φ = 8131968.

The previous prime is 12311219. The next prime is 12311251. The reversal of 12311223 is 32211321.

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

It is not a de Polignac number, because 12311223 - 2² = 12311219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12311023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18498 + ... + 19151.

It is an arithmetic number, because the mean of its divisors is an integer number (2070750).

Almost surely, 2^12311223 is an apocalyptic number.

12311223 is a deficient number, since it is larger than the sum of its proper divisors (4254777).

12311223 is a wasteful number, since it uses less digits than its factorization.

12311223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37761.

The product of its digits is 72, while the sum is 15.

The square root of 12311223 is about 3508.7352422205. The cubic root of 12311223 is about 230.9052102608.

Adding to 12311223 its reverse (32211321), we get a palindrome (44522544).

The spelling of 12311223 in words is "twelve million, three hundred eleven thousand, two hundred twenty-three".