12515433451521 has 32 divisors (see below), whose sum is σ = 22405251499008. Its totient is φ = 6001406648640.

The previous prime is 12515433451463. The next prime is 12515433451567.

12515433451521 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 12515433451521 - 2¹³ = 12515433443329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12515433451621) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2083818751 + ... + 2083824756.

It is an arithmetic number, because the mean of its divisors is an integer number (700164109344).

Almost surely, 2^{12515433451521} is an apocalyptic number.

12515433451521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12515433451521 is a deficient number, since it is larger than the sum of its proper divisors (9889818047487).

12515433451521 is a wasteful number, since it uses less digits than its factorization.

12515433451521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4167643541.

The product of its digits is 360000, while the sum is 42.

The spelling of 12515433451521 in words is "twelve trillion, five hundred fifteen billion, four hundred thirty-three million, four hundred fifty-one thousand, five hundred twenty-one".