13312161 has 8 divisors (see below), whose sum is σ = 19721760. Its totient is φ = 8874756.

The previous prime is 13312151. The next prime is 13312181. The reversal of 13312161 is 16121331.

It is not a de Polignac number, because 13312161 - 2⁵ = 13312129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13312151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 246495 + ... + 246548.

It is an arithmetic number, because the mean of its divisors is an integer number (2465220).

Almost surely, 2^13312161 is an apocalyptic number.

It is an amenable number.

13312161 is a deficient number, since it is larger than the sum of its proper divisors (6409599).

13312161 is an equidigital number, since it uses as much as digits as its factorization.

13312161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493052 (or 493046 counting only the distinct ones).

The product of its digits is 108, while the sum is 18.

The square root of 13312161 is about 3648.5834237413. The cubic root of 13312161 is about 237.0006409212. Note that the first 3 decimals are identical.

Subtracting from 13312161 its product of digits (108), we obtain a cube (13312053 = 237³).

Adding to 13312161 its reverse (16121331), we get a palindrome (29433492).

The spelling of 13312161 in words is "thirteen million, three hundred twelve thousand, one hundred sixty-one".