11323443531 has 4 divisors (see below), whose sum is σ = 15097924712. Its totient is φ = 7548962352.

The previous prime is 11323443511. The next prime is 11323443541. The reversal of 11323443531 is 13534432311.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 11323443531 - 2⁷ = 11323443403 is a prime.

It is a super-2 number, since 2×11323443531² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11323443511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1887240586 + ... + 1887240591.

It is an arithmetic number, because the mean of its divisors is an integer number (3774481178).

Almost surely, 2^11323443531 is an apocalyptic number.

11323443531 is a deficient number, since it is larger than the sum of its proper divisors (3774481181).

11323443531 is an equidigital number, since it uses as much as digits as its factorization.

11323443531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3774481180.

The product of its digits is 12960, while the sum is 30.

Adding to 11323443531 its reverse (13534432311), we get a palindrome (24857875842).

The spelling of 11323443531 in words is "eleven billion, three hundred twenty-three million, four hundred forty-three thousand, five hundred thirty-one".