12516313 has 4 divisors (see below), whose sum is σ = 12947940. Its totient is φ = 12084688.

The previous prime is 12516299. The next prime is 12516341. The reversal of 12516313 is 31361521.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2862864 + 9653449 = 1692^2 + 3107^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12516313 is a prime.

It is a super-2 number, since 2×12516313² = 313316182227938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12516373) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215770 + ... + 215827.

It is an arithmetic number, because the mean of its divisors is an integer number (3236985).

Almost surely, 2^12516313 is an apocalyptic number.

It is an amenable number.

12516313 is a deficient number, since it is larger than the sum of its proper divisors (431627).

12516313 is an equidigital number, since it uses as much as digits as its factorization.

12516313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431626.

The product of its digits is 540, while the sum is 22.

The square root of 12516313 is about 3537.8401603238. The cubic root of 12516313 is about 232.1803554461.

Adding to 12516313 its reverse (31361521), we get a palindrome (43877834).

The spelling of 12516313 in words is "twelve million, five hundred sixteen thousand, three hundred thirteen".