12543241423 has 2 divisors, whose sum is σ = 12543241424. Its totient is φ = 12543241422.

The previous prime is 12543241387. The next prime is 12543241439. The reversal of 12543241423 is 32414234521.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12543241423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12543241493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6271620711 + 6271620712.

It is an arithmetic number, because the mean of its divisors is an integer number (6271620712).

Almost surely, 2^12543241423 is an apocalyptic number.

12543241423 is a deficient number, since it is larger than the sum of its proper divisors (1).

12543241423 is an equidigital number, since it uses as much as digits as its factorization.

12543241423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23040, while the sum is 31.

Adding to 12543241423 its reverse (32414234521), we get a palindrome (44957475944).

The spelling of 12543241423 in words is "twelve billion, five hundred forty-three million, two hundred forty-one thousand, four hundred twenty-three".