13811216 has 20 divisors (see below), whose sum is σ = 26892624. Its totient is φ = 6871200.

The previous prime is 13811209. The next prime is 13811227. The reversal of 13811216 is 61211831.

It is a junction number, because it is equal to n+sod(n) for n = 13811191 and 13811200.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1331 + ... + 5421.

Almost surely, 2^13811216 is an apocalyptic number.

13811216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13811216 is a deficient number, since it is larger than the sum of its proper divisors (13081408).

13811216 is a wasteful number, since it uses less digits than its factorization.

13811216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4310 (or 4304 counting only the distinct ones).

The product of its digits is 288, while the sum is 23.

The square root of 13811216 is about 3716.3444404414. The cubic root of 13811216 is about 239.9259957015.

The spelling of 13811216 in words is "thirteen million, eight hundred eleven thousand, two hundred sixteen".