171131 has 2 divisors, whose sum is σ = 171132. Its totient is φ = 171130.

The previous prime is 171103. The next prime is 171161. The reversal of 171131 is 131171.

It is a weak prime.

It is an emirp because it is prime and its reverse (131171) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 171131 - 2¹⁴ = 154747 is a prime.

It is a super-2 number, since 2×171131² = 58571638322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (171161) 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 as a sum of consecutive naturals, namely, 85565 + 85566.

It is an arithmetic number, because the mean of its divisors is an integer number (85566).

2¹⁷¹¹³¹ is an apocalyptic number.

171131 is a deficient number, since it is larger than the sum of its proper divisors (1).

171131 is an equidigital number, since it uses as much as digits as its factorization.

171131 is an odious number, because the sum of its binary digits is odd.

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

The square root of 171131 is about 413.6798278863. The cubic root of 171131 is about 55.5191612004.

The spelling of 171131 in words is "one hundred seventy-one thousand, one hundred thirty-one".