1311131423 has 24 divisors (see below), whose sum is σ = 1589592960. Its totient is φ = 1059201360.

The previous prime is 1311131389. The next prime is 1311131449. The reversal of 1311131423 is 3241311131.

It is not a de Polignac number, because 1311131423 - 2⁸ = 1311131167 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1311131395 and 1311131404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311131623) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 531968 + ... + 534426.

It is an arithmetic number, because the mean of its divisors is an integer number (66233040).

Almost surely, 2^1311131423 is an apocalyptic number.

1311131423 is a deficient number, since it is larger than the sum of its proper divisors (278461537).

1311131423 is a wasteful number, since it uses less digits than its factorization.

1311131423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2715 (or 2696 counting only the distinct ones).

The product of its digits is 216, while the sum is 20.

The square root of 1311131423 is about 36209.5487820547. The cubic root of 1311131423 is about 1094.4990996616.

Adding to 1311131423 its reverse (3241311131), we get a palindrome (4552442554).

The spelling of 1311131423 in words is "one billion, three hundred eleven million, one hundred thirty-one thousand, four hundred twenty-three".