13216161 has 8 divisors (see below), whose sum is σ = 20138944. Its totient is φ = 7552080.

The previous prime is 13216127. The next prime is 13216171. The reversal of 13216161 is 16161231.

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

It is not a de Polignac number, because 13216161 - 2⁶ = 13216097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 629341 = 13216161 / (1 + 3 + 2 + 1 + 6 + 1 + 6 + 1).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13216171) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 314650 + ... + 314691.

It is an arithmetic number, because the mean of its divisors is an integer number (2517368).

Almost surely, 2^13216161 is an apocalyptic number.

It is an amenable number.

13216161 is a deficient number, since it is larger than the sum of its proper divisors (6922783).

13216161 is an equidigital number, since it uses as much as digits as its factorization.

13216161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629351.

The product of its digits is 216, while the sum is 21.

The square root of 13216161 is about 3635.4038290127. The cubic root of 13216161 is about 236.4295597497.

Adding to 13216161 its reverse (16161231), we get a palindrome (29377392).

The spelling of 13216161 in words is "thirteen million, two hundred sixteen thousand, one hundred sixty-one".