13216539 has 16 divisors (see below), whose sum is σ = 20224512. Its totient is φ = 7520448.

The previous prime is 13216519. The next prime is 13216543. The reversal of 13216539 is 93561231.

13216539 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13216539 - 2⁵ = 13216507 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13216519) 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 15 ways as a sum of consecutive naturals, for example, 4327 + ... + 6719.

It is an arithmetic number, because the mean of its divisors is an integer number (1264032).

Almost surely, 2^13216539 is an apocalyptic number.

13216539 is a deficient number, since it is larger than the sum of its proper divisors (7007973).

13216539 is a wasteful number, since it uses less digits than its factorization.

13216539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2666.

The product of its digits is 4860, while the sum is 30.

The square root of 13216539 is about 3635.4558173632. The cubic root of 13216539 is about 236.4318137961.

The spelling of 13216539 in words is "thirteen million, two hundred sixteen thousand, five hundred thirty-nine".