12515433451522 has 4 divisors (see below), whose sum is σ = 18773150177286. Its totient is φ = 6257716725760.

The previous prime is 12515433451463. The next prime is 12515433451567. The reversal of 12515433451522 is 22515433451521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 6622186836321 + 5893246615201 = 2573361^2 + 2427601^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3128858362879 + ... + 3128858362882.

Almost surely, 2^{12515433451522} is an apocalyptic number.

12515433451522 is a deficient number, since it is larger than the sum of its proper divisors (6257716725764).

12515433451522 is an equidigital number, since it uses as much as digits as its factorization.

12515433451522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6257716725763.

The product of its digits is 720000, while the sum is 43.

Subtracting 12515433451522 from its reverse (22515433451521), we obtain a palindrome (9999999999999).

The spelling of 12515433451522 in words is "twelve trillion, five hundred fifteen billion, four hundred thirty-three million, four hundred fifty-one thousand, five hundred twenty-two".