12323442531 has 4 divisors (see below), whose sum is σ = 16431256712. Its totient is φ = 8215628352.

The previous prime is 12323442473. The next prime is 12323442557. The reversal of 12323442531 is 13524432321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13524432321 = 3 ⋅4508144107.

It is not a de Polignac number, because 12323442531 - 2⁷ = 12323442403 is a prime.

It is a super-2 number, since 2×12323442531² (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 (12323442581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2053907086 + ... + 2053907091.

It is an arithmetic number, because the mean of its divisors is an integer number (4107814178).

Almost surely, 2^12323442531 is an apocalyptic number.

12323442531 is a deficient number, since it is larger than the sum of its proper divisors (4107814181).

12323442531 is an equidigital number, since it uses as much as digits as its factorization.

12323442531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4107814180.

The product of its digits is 17280, while the sum is 30.

Adding to 12323442531 its reverse (13524432321), we get a palindrome (25847874852).

The spelling of 12323442531 in words is "twelve billion, three hundred twenty-three million, four hundred forty-two thousand, five hundred thirty-one".