123231023543 has 2 divisors, whose sum is σ = 123231023544. Its totient is φ = 123231023542.

The previous prime is 123231023521. The next prime is 123231023569. The reversal of 123231023543 is 345320132321.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123231023543 - 2⁸ = 123231023287 is a prime.

It is a super-4 number, since 4×123231023543⁴ (a number of 45 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123231023243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61615511771 + 61615511772.

It is an arithmetic number, because the mean of its divisors is an integer number (61615511772).

Almost surely, 2^123231023543 is an apocalyptic number.

123231023543 is a deficient number, since it is larger than the sum of its proper divisors (1).

123231023543 is an equidigital number, since it uses as much as digits as its factorization.

123231023543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 29.

Adding to 123231023543 its reverse (345320132321), we get a palindrome (468551155864).

The spelling of 123231023543 in words is "one hundred twenty-three billion, two hundred thirty-one million, twenty-three thousand, five hundred forty-three".