328161 has 4 divisors (see below), whose sum is σ = 437552. Its totient is φ = 218772.

The previous prime is 328129. The next prime is 328171. The reversal of 328161 is 161823.

328161 is nontrivially palindromic in base 15.

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.

It is not a de Polignac number, because 328161 - 2⁵ = 328129 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (328121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54691 + ... + 54696.

It is an arithmetic number, because the mean of its divisors is an integer number (109388).

2³²⁸¹⁶¹ is an apocalyptic number.

It is an amenable number.

328161 is a deficient number, since it is larger than the sum of its proper divisors (109391).

328161 is a wasteful number, since it uses less digits than its factorization.

328161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109390.

The product of its digits is 288, while the sum is 21.

The square root of 328161 is about 572.8533843838. The cubic root of 328161 is about 68.9756267622.

Adding to 328161 its reverse (161823), we get a palindrome (489984).

The spelling of 328161 in words is "three hundred twenty-eight thousand, one hundred sixty-one".