13816221 has 8 divisors (see below), whose sum is σ = 18871104. Its totient is φ = 8986080.

The previous prime is 13816217. The next prime is 13816241. The reversal of 13816221 is 12261831.

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

It is not a de Polignac number, because 13816221 - 2² = 13816217 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 13816191 and 13816200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13816241) 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 7 ways as a sum of consecutive naturals, for example, 56041 + ... + 56286.

It is an arithmetic number, because the mean of its divisors is an integer number (2358888).

Almost surely, 2^13816221 is an apocalyptic number.

It is an amenable number.

13816221 is a deficient number, since it is larger than the sum of its proper divisors (5054883).

13816221 is a wasteful number, since it uses less digits than its factorization.

13816221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112371.

The product of its digits is 576, while the sum is 24.

The square root of 13816221 is about 3717.0177562126. The cubic root of 13816221 is about 239.9549741922.

The spelling of 13816221 in words is "thirteen million, eight hundred sixteen thousand, two hundred twenty-one".