12315513 has 24 divisors (see below), whose sum is σ = 19243200. Its totient is φ = 6985440.

The previous prime is 12315509. The next prime is 12315521. The reversal of 12315513 is 31551321.

It is not a de Polignac number, because 12315513 - 2² = 12315509 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12315513.

It is not an unprimeable number, because it can be changed into a prime (12315013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29043 + ... + 29463.

It is an arithmetic number, because the mean of its divisors is an integer number (801800).

Almost surely, 2^12315513 is an apocalyptic number.

It is an amenable number.

12315513 is a deficient number, since it is larger than the sum of its proper divisors (6927687).

12315513 is a wasteful number, since it uses less digits than its factorization.

12315513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637 (or 630 counting only the distinct ones).

The product of its digits is 450, while the sum is 21.

The square root of 12315513 is about 3509.3465203653. The cubic root of 12315513 is about 230.9320277512.

Adding to 12315513 its reverse (31551321), we get a palindrome (43866834).

The spelling of 12315513 in words is "twelve million, three hundred fifteen thousand, five hundred thirteen".