13191563 has 16 divisors (see below), whose sum is σ = 16698624. Its totient is φ = 10121760.

The previous prime is 13191559. The next prime is 13191599. The reversal of 13191563 is 36519131.

It is not a de Polignac number, because 13191563 - 2² = 13191559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13191533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3881 + ... + 6437.

It is an arithmetic number, because the mean of its divisors is an integer number (1043664).

Almost surely, 2^13191563 is an apocalyptic number.

13191563 is a deficient number, since it is larger than the sum of its proper divisors (3507061).

13191563 is a wasteful number, since it uses less digits than its factorization.

13191563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2642.

The product of its digits is 2430, while the sum is 29.

The square root of 13191563 is about 3632.0191354121. The cubic root of 13191563 is about 236.2827872713.

It can be divided in two parts, 1319 and 1563, that added together give a palindrome (2882).

The spelling of 13191563 in words is "thirteen million, one hundred ninety-one thousand, five hundred sixty-three".