12443232515 has 16 divisors (see below), whose sum is σ = 17068563648. Its totient is φ = 8530722816.

The previous prime is 12443232499. The next prime is 12443232517. The reversal of 12443232515 is 51523234421.

It is not a de Polignac number, because 12443232515 - 2⁴ = 12443232499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12443232517) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145859 + ... + 214851.

It is an arithmetic number, because the mean of its divisors is an integer number (1066785228).

Almost surely, 2^12443232515 is an apocalyptic number.

12443232515 is a deficient number, since it is larger than the sum of its proper divisors (4625331133).

12443232515 is an equidigital number, since it uses as much as digits as its factorization.

12443232515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74158.

The product of its digits is 28800, while the sum is 32.

Adding to 12443232515 its reverse (51523234421), we get a palindrome (63966466936).

The spelling of 12443232515 in words is "twelve billion, four hundred forty-three million, two hundred thirty-two thousand, five hundred fifteen".