12515430432 has 48 divisors (see below), whose sum is σ = 33191720352. Its totient is φ = 4128798720.

The previous prime is 12515430407. The next prime is 12515430437. The reversal of 12515430432 is 23403451521.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 12515430432.

It is not an unprimeable number, because it can be changed into a prime (12515430437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 662694 + ... + 681317.

It is an arithmetic number, because the mean of its divisors is an integer number (691494174).

Almost surely, 2^12515430432 is an apocalyptic number.

12515430432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12515430432 is an abundant number, since it is smaller than the sum of its proper divisors (20676289920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12515430432 is a wasteful number, since it uses less digits than its factorization.

12515430432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1344121 (or 1344113 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 12515430432 its reverse (23403451521), we get a palindrome (35918881953).

The spelling of 12515430432 in words is "twelve billion, five hundred fifteen million, four hundred thirty thousand, four hundred thirty-two".