173281 has 4 divisors (see below), whose sum is σ = 183492. Its totient is φ = 163072.

The previous prime is 173273. The next prime is 173291. The reversal of 173281 is 182371.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 182371 = 7 ⋅26053.

It can be written as a sum of positive squares in 2 ways, for example, as 129600 + 43681 = 360^2 + 209^2 .

It is a cyclic number.

It is not a de Polignac number, because 173281 - 2³ = 173273 is a prime.

It is a super-2 number, since 2×173281² = 60052609922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (173291) 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, 5080 + ... + 5113.

It is an arithmetic number, because the mean of its divisors is an integer number (45873).

2¹⁷³²⁸¹ is an apocalyptic number.

It is an amenable number.

173281 is a deficient number, since it is larger than the sum of its proper divisors (10211).

173281 is a wasteful number, since it uses less digits than its factorization.

173281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10210.

The product of its digits is 336, while the sum is 22.

The square root of 173281 is about 416.2703448482. The cubic root of 173281 is about 55.7506987787.

It can be divided in two parts, 173 and 281, that added together give a palindrome (454).

The spelling of 173281 in words is "one hundred seventy-three thousand, two hundred eighty-one".