12311433 has 20 divisors (see below), whose sum is σ = 18988288. Its totient is φ = 7941240.

The previous prime is 12311419. The next prime is 12311443. The reversal of 12311433 is 33411321.

12311433 is a `hidden beast` number, since 1 + 231 + 1 + 433 = 666.

It is not a de Polignac number, because 12311433 - 2⁵ = 12311401 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12311443) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 60 + ... + 4962.

It is a self-describing number.

Almost surely, 2^12311433 is an apocalyptic number.

It is an amenable number.

12311433 is a deficient number, since it is larger than the sum of its proper divisors (6676855).

12311433 is an equidigital number, since it uses as much as digits as its factorization.

12311433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4946 (or 4937 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 12311433 is about 3508.7651674058. The cubic root of 12311433 is about 230.9065231501.

Adding to 12311433 its reverse (33411321), we get a palindrome (45722754).

The spelling of 12311433 in words is "twelve million, three hundred eleven thousand, four hundred thirty-three".