173231 has 4 divisors (see below), whose sum is σ = 174264. Its totient is φ = 172200.

The previous prime is 173219. The next prime is 173249. The reversal of 173231 is 132371.

173231 is nontrivially palindromic in base 13.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-173231 is a prime.

It is a super-2 number, since 2×173231² = 60017958722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent 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, 200 + ... + 621.

It is an arithmetic number, because the mean of its divisors is an integer number (43566).

2¹⁷³²³¹ is an apocalyptic number.

173231 is a deficient number, since it is larger than the sum of its proper divisors (1033).

173231 is an equidigital number, since it uses as much as digits as its factorization.

173231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1032.

The product of its digits is 126, while the sum is 17.

The square root of 173231 is about 416.2102833905. The cubic root of 173231 is about 55.7453359997.

It can be divided in two parts, 173 and 231, that added together give a palindrome (404).

The spelling of 173231 in words is "one hundred seventy-three thousand, two hundred thirty-one".