11431131223 has 4 divisors (see below), whose sum is σ = 11696971528. Its totient is φ = 11165290920.

The previous prime is 11431131197. The next prime is 11431131227. The reversal of 11431131223 is 32213113411.

11431131223 is digitally balanced in base 2, 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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11431131223 is a prime.

It is a super-2 number, since 2×11431131223² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11431131194 and 11431131203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11431131227) 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 3 ways as a sum of consecutive naturals, for example, 132920088 + ... + 132920173.

It is an arithmetic number, because the mean of its divisors is an integer number (2924242882).

Almost surely, 2^11431131223 is an apocalyptic number.

11431131223 is a deficient number, since it is larger than the sum of its proper divisors (265840305).

11431131223 is an equidigital number, since it uses as much as digits as its factorization.

11431131223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265840304.

The product of its digits is 432, while the sum is 22.

Adding to 11431131223 its reverse (32213113411), we get a palindrome (43644244634).

The spelling of 11431131223 in words is "eleven billion, four hundred thirty-one million, one hundred thirty-one thousand, two hundred twenty-three".