12443432431 has 2 divisors, whose sum is σ = 12443432432. Its totient is φ = 12443432430.

The previous prime is 12443432429. The next prime is 12443432453. The reversal of 12443432431 is 13423434421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12443432431 - 2¹ = 12443432429 is a prime.

It is a super-2 number, since 2×12443432431² (a number of 21 digits) contains 22 as substring.

Together with 12443432429, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 12443432393 and 12443432402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12443432411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6221716215 + 6221716216.

It is an arithmetic number, because the mean of its divisors is an integer number (6221716216).

Almost surely, 2^12443432431 is an apocalyptic number.

12443432431 is a deficient number, since it is larger than the sum of its proper divisors (1).

12443432431 is an equidigital number, since it uses as much as digits as its factorization.

12443432431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 31.

Adding to 12443432431 its reverse (13423434421), we get a palindrome (25866866852).

The spelling of 12443432431 in words is "twelve billion, four hundred forty-three million, four hundred thirty-two thousand, four hundred thirty-one".