12443333431 has 4 divisors (see below), whose sum is σ = 12984347952. Its totient is φ = 11902318912.

The previous prime is 12443333423. The next prime is 12443333503. The reversal of 12443333431 is 13433334421.

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

It is a cyclic number.

It is not a de Polignac number, because 12443333431 - 2³ = 12443333423 is a prime.

It is a super-2 number, since 2×12443333431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12443333393 and 12443333402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12443333401) 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, 270507226 + ... + 270507271.

It is an arithmetic number, because the mean of its divisors is an integer number (3246086988).

Almost surely, 2^12443333431 is an apocalyptic number.

12443333431 is a deficient number, since it is larger than the sum of its proper divisors (541014521).

12443333431 is an equidigital number, since it uses as much as digits as its factorization.

12443333431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541014520.

The product of its digits is 31104, while the sum is 31.

Adding to 12443333431 its reverse (13433334421), we get a palindrome (25876667852).

The spelling of 12443333431 in words is "twelve billion, four hundred forty-three million, three hundred thirty-three thousand, four hundred thirty-one".