11531423 has 12 divisors (see below), whose sum is σ = 12893040. Its totient is φ = 10276416.

The previous prime is 11531419. The next prime is 11531431. The reversal of 11531423 is 32413511.

It is not a de Polignac number, because 11531423 - 2² = 11531419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11531395 and 11531404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11531413) 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 11 ways as a sum of consecutive naturals, for example, 5198 + ... + 7076.

It is an arithmetic number, because the mean of its divisors is an integer number (1074420).

Almost surely, 2^11531423 is an apocalyptic number.

11531423 is a deficient number, since it is larger than the sum of its proper divisors (1361617).

11531423 is a wasteful number, since it uses less digits than its factorization.

11531423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1934 (or 1915 counting only the distinct ones).

The product of its digits is 360, while the sum is 20.

The square root of 11531423 is about 3395.7948995780. The cubic root of 11531423 is about 225.9232712615.

Adding to 11531423 its reverse (32413511), we get a palindrome (43944934).

The spelling of 11531423 in words is "eleven million, five hundred thirty-one thousand, four hundred twenty-three".