12315013543 has 12 divisors (see below), whose sum is σ = 14327762592. Its totient is φ = 10554153120.

The previous prime is 12315013541. The next prime is 12315013561. The reversal of 12315013543 is 34531051321.

It is a happy number.

It is not a de Polignac number, because 12315013543 - 2¹ = 12315013541 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 (12315013541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 414946 + ... + 443632.

It is an arithmetic number, because the mean of its divisors is an integer number (1193980216).

Almost surely, 2^12315013543 is an apocalyptic number.

12315013543 is a deficient number, since it is larger than the sum of its proper divisors (2012749049).

12315013543 is an equidigital number, since it uses as much as digits as its factorization.

12315013543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37462 (or 37455 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 28.

Adding to 12315013543 its reverse (34531051321), we get a palindrome (46846064864).

The spelling of 12315013543 in words is "twelve billion, three hundred fifteen million, thirteen thousand, five hundred forty-three".