13822161 has 4 divisors (see below), whose sum is σ = 18429552. Its totient is φ = 9214772.

The previous prime is 13822157. The next prime is 13822217. The reversal of 13822161 is 16122831.

13822161 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16122831 = 3 ⋅5374277.

It is a cyclic number.

It is not a de Polignac number, because 13822161 - 2² = 13822157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13820161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2303691 + ... + 2303696.

It is an arithmetic number, because the mean of its divisors is an integer number (4607388).

Almost surely, 2^13822161 is an apocalyptic number.

It is an amenable number.

13822161 is a deficient number, since it is larger than the sum of its proper divisors (4607391).

13822161 is an equidigital number, since it uses as much as digits as its factorization.

13822161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4607390.

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

The square root of 13822161 is about 3717.8166980097. The cubic root of 13822161 is about 239.9893571669.

Adding to 13822161 its reverse (16122831), we get a palindrome (29944992).

The spelling of 13822161 in words is "thirteen million, eight hundred twenty-two thousand, one hundred sixty-one".