13431113543 has 2 divisors, whose sum is σ = 13431113544. Its totient is φ = 13431113542.

The previous prime is 13431113539. The next prime is 13431113573. The reversal of 13431113543 is 34531113431.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13431113543 - 2² = 13431113539 is a prime.

It is a super-2 number, since 2×13431113543² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13431113503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6715556771 + 6715556772.

It is an arithmetic number, because the mean of its divisors is an integer number (6715556772).

Almost surely, 2^13431113543 is an apocalyptic number.

13431113543 is a deficient number, since it is larger than the sum of its proper divisors (1).

13431113543 is an equidigital number, since it uses as much as digits as its factorization.

13431113543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 29.

Adding to 13431113543 its reverse (34531113431), we get a palindrome (47962226974).

The spelling of 13431113543 in words is "thirteen billion, four hundred thirty-one million, one hundred thirteen thousand, five hundred forty-three".