12515201323 has 4 divisors (see below), whose sum is σ = 12559739688. Its totient is φ = 12470662960.

The previous prime is 12515201297. The next prime is 12515201353. The reversal of 12515201323 is 32310251521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32310251521 = 9109 ⋅3547069.

It is a cyclic number.

It is not a de Polignac number, because 12515201323 - 2²⁹ = 11978330411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12515201353) 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, 22268761 + ... + 22269322.

It is an arithmetic number, because the mean of its divisors is an integer number (3139934922).

Almost surely, 2^12515201323 is an apocalyptic number.

12515201323 is a deficient number, since it is larger than the sum of its proper divisors (44538365).

12515201323 is an equidigital number, since it uses as much as digits as its factorization.

12515201323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44538364.

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 12515201323 its reverse (32310251521), we get a palindrome (44825452844).

The spelling of 12515201323 in words is "twelve billion, five hundred fifteen million, two hundred one thousand, three hundred twenty-three".