13135563 has 12 divisors (see below), whose sum is σ = 21684208. Its totient is φ = 7506000.

The previous prime is 13135541. The next prime is 13135601. The reversal of 13135563 is 36553131.

It is not a de Polignac number, because 13135563 - 2⁸ = 13135307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13135523) 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 11 ways as a sum of consecutive naturals, for example, 104188 + ... + 104313.

Almost surely, 2^13135563 is an apocalyptic number.

13135563 is a deficient number, since it is larger than the sum of its proper divisors (8548645).

13135563 is a wasteful number, since it uses less digits than its factorization.

13135563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208514 (or 208511 counting only the distinct ones).

The product of its digits is 4050, while the sum is 27.

The square root of 13135563 is about 3624.3017258501. The cubic root of 13135563 is about 235.9479620494.

Adding to 13135563 its reverse (36553131), we get a palindrome (49688694).

The spelling of 13135563 in words is "thirteen million, one hundred thirty-five thousand, five hundred sixty-three".