12815516 has 12 divisors (see below), whose sum is σ = 25631088. Its totient is φ = 5492352.

The previous prime is 12815503. The next prime is 12815533. The reversal of 12815516 is 61551821.

12815516 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228821 + ... + 228876.

It is an arithmetic number, because the mean of its divisors is an integer number (2135924).

Almost surely, 2^12815516 is an apocalyptic number.

It is an amenable number.

12815516 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12815516 is a wasteful number, since it uses less digits than its factorization.

12815516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457708 (or 457706 counting only the distinct ones).

The product of its digits is 2400, while the sum is 29.

The square root of 12815516 is about 3579.8765341838. The cubic root of 12815516 is about 234.0158997646.

It can be divided in two parts, 12815 and 516, that added together give a palindrome (13331).

The spelling of 12815516 in words is "twelve million, eight hundred fifteen thousand, five hundred sixteen".