13112256515 has 4 divisors (see below), whose sum is σ = 15734707824. Its totient is φ = 10489805208.

The previous prime is 13112256511. The next prime is 13112256541. The reversal of 13112256515 is 51565221131.

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

It is a cyclic number.

It is not a de Polignac number, because 13112256515 - 2² = 13112256511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13112256511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1311225647 + ... + 1311225656.

It is an arithmetic number, because the mean of its divisors is an integer number (3933676956).

Almost surely, 2^13112256515 is an apocalyptic number.

13112256515 is a deficient number, since it is larger than the sum of its proper divisors (2622451309).

13112256515 is an equidigital number, since it uses as much as digits as its factorization.

13112256515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2622451308.

The product of its digits is 9000, while the sum is 32.

Adding to 13112256515 its reverse (51565221131), we get a palindrome (64677477646).

The spelling of 13112256515 in words is "thirteen billion, one hundred twelve million, two hundred fifty-six thousand, five hundred fifteen".