12315563 has 4 divisors (see below), whose sum is σ = 13262928. Its totient is φ = 11368200.

The previous prime is 12315559. The next prime is 12315577. The reversal of 12315563 is 36551321.

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 12315563 - 2² = 12315559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12314563) 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 3 ways as a sum of consecutive naturals, for example, 473663 + ... + 473688.

It is an arithmetic number, because the mean of its divisors is an integer number (3315732).

Almost surely, 2^12315563 is an apocalyptic number.

12315563 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12315563 is a deficient number, since it is larger than the sum of its proper divisors (947365).

12315563 is an equidigital number, since it uses as much as digits as its factorization.

12315563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947364.

The product of its digits is 2700, while the sum is 26.

The square root of 12315563 is about 3509.3536441915. The cubic root of 12315563 is about 230.9323402727.

Adding to 12315563 its reverse (36551321), we get a palindrome (48866884).

The spelling of 12315563 in words is "twelve million, three hundred fifteen thousand, five hundred sixty-three".