13145563 has 4 divisors (see below), whose sum is σ = 13155520. Its totient is φ = 13135608.

The previous prime is 13145557. The next prime is 13145597. The reversal of 13145563 is 36554131.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13145563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13145513) 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, 2628 + ... + 5761.

It is an arithmetic number, because the mean of its divisors is an integer number (3288880).

Almost surely, 2^13145563 is an apocalyptic number.

13145563 is a deficient number, since it is larger than the sum of its proper divisors (9957).

13145563 is an equidigital number, since it uses as much as digits as its factorization.

13145563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9956.

The product of its digits is 5400, while the sum is 28.

The square root of 13145563 is about 3625.6810394738. The cubic root of 13145563 is about 236.0078219662.

Adding to 13145563 its reverse (36554131), we get a palindrome (49699694).

The spelling of 13145563 in words is "thirteen million, one hundred forty-five thousand, five hundred sixty-three".