13216549 has 2 divisors, whose sum is σ = 13216550. Its totient is φ = 13216548.

The previous prime is 13216543. The next prime is 13216561. The reversal of 13216549 is 94561231.

13216549 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8122500 + 5094049 = 2850^2 + 2257^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13216549 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13216549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13216543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6608274 + 6608275.

It is an arithmetic number, because the mean of its divisors is an integer number (6608275).

Almost surely, 2^13216549 is an apocalyptic number.

It is an amenable number.

13216549 is a deficient number, since it is larger than the sum of its proper divisors (1).

13216549 is an equidigital number, since it uses as much as digits as its factorization.

13216549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 31.

The square root of 13216549 is about 3635.4571927063. The cubic root of 13216549 is about 236.4318734264.

The spelling of 13216549 in words is "thirteen million, two hundred sixteen thousand, five hundred forty-nine".