171311 has 4 divisors (see below), whose sum is σ = 195792. Its totient is φ = 146832.

The previous prime is 171299. The next prime is 171317. The reversal of 171311 is 113171.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 171311 - 2¹⁴ = 154927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12230 + ... + 12243.

It is an arithmetic number, because the mean of its divisors is an integer number (48948).

2¹⁷¹³¹¹ is an apocalyptic number.

171311 is a deficient number, since it is larger than the sum of its proper divisors (24481).

171311 is an equidigital number, since it uses as much as digits as its factorization.

171311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24480.

The product of its digits is 21, while the sum is 14.

The square root of 171311 is about 413.8973302644. The cubic root of 171311 is about 55.5386198749.

Adding to 171311 its reverse (113171), we get a palindrome (284482).

The spelling of 171311 in words is "one hundred seventy-one thousand, three hundred eleven", and thus it is an iban number.