13216533 has 32 divisors (see below), whose sum is σ = 20528640. Its totient is φ = 7479360.

The previous prime is 13216519. The next prime is 13216543. The reversal of 13216533 is 33561231.

It is a happy number.

13216533 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13216533 - 2²⁰ = 12167957 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13216543) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66991 + ... + 67187.

It is an arithmetic number, because the mean of its divisors is an integer number (641520).

Almost surely, 2^13216533 is an apocalyptic number.

It is an amenable number.

13216533 is a deficient number, since it is larger than the sum of its proper divisors (7312107).

13216533 is a wasteful number, since it uses less digits than its factorization.

13216533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337.

The product of its digits is 1620, while the sum is 24.

The square root of 13216533 is about 3635.4549921571. The cubic root of 13216533 is about 236.4317780180.

Adding to 13216533 its reverse (33561231), we get a palindrome (46777764).

The spelling of 13216533 in words is "thirteen million, two hundred sixteen thousand, five hundred thirty-three".