12312443543 has 4 divisors (see below), whose sum is σ = 12370796568. Its totient is φ = 12254090520.

The previous prime is 12312443537. The next prime is 12312443581. The reversal of 12312443543 is 34534421321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34534421321 = 31 ⋅1114013591.

It is a cyclic number.

It is not a de Polignac number, because 12312443543 - 2⁴ = 12312443527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12312443503) 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, 29176196 + ... + 29176617.

It is an arithmetic number, because the mean of its divisors is an integer number (3092699142).

Almost surely, 2^12312443543 is an apocalyptic number.

12312443543 is a deficient number, since it is larger than the sum of its proper divisors (58353025).

12312443543 is an equidigital number, since it uses as much as digits as its factorization.

12312443543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58353024.

The product of its digits is 34560, while the sum is 32.

Adding to 12312443543 its reverse (34534421321), we get a palindrome (46846864864).

The spelling of 12312443543 in words is "twelve billion, three hundred twelve million, four hundred forty-three thousand, five hundred forty-three".