83161 has 4 divisors (see below), whose sum is σ = 89572. Its totient is φ = 76752.

The previous prime is 83137. The next prime is 83177. The reversal of 83161 is 16138.

83161 is nontrivially palindromic in base 15.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16138 = 2 ⋅8069.

It can be written as a sum of positive squares in 2 ways, for example, as 4761 + 78400 = 69^2 + 280^2 .

It is a de Polignac number, because none of the positive numbers 2^k-83161 is a prime.

It is a Duffinian number.

83161 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (83101) 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, 3186 + ... + 3211.

It is an arithmetic number, because the mean of its divisors is an integer number (22393).

2⁸³¹⁶¹ is an apocalyptic number.

It is an amenable number.

83161 is a deficient number, since it is larger than the sum of its proper divisors (6411).

83161 is a wasteful number, since it uses less digits than its factorization.

83161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6410.

The product of its digits is 144, while the sum is 19.

The square root of 83161 is about 288.3764900265. The cubic root of 83161 is about 43.6488930508.

Adding to 83161 its reverse (16138), we get a palindrome (99299).

The spelling of 83161 in words is "eighty-three thousand, one hundred sixty-one".