13216534 has 8 divisors (see below), whose sum is σ = 19871280. Its totient is φ = 6592776.

The previous prime is 13216519. The next prime is 13216543. The reversal of 13216534 is 43561231.

13216534 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 13216499 and 13216508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6649 + ... + 8404.

It is an arithmetic number, because the mean of its divisors is an integer number (2483910).

Almost surely, 2^13216534 is an apocalyptic number.

13216534 is a deficient number, since it is larger than the sum of its proper divisors (6654746).

13216534 is a wasteful number, since it uses less digits than its factorization.

13216534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15494.

The product of its digits is 2160, while the sum is 25.

The square root of 13216534 is about 3635.4551296915. The cubic root of 13216534 is about 236.4317839810.

Adding to 13216534 its reverse (43561231), we get a palindrome (56777765).

The spelling of 13216534 in words is "thirteen million, two hundred sixteen thousand, five hundred thirty-four".