231271 has 2 divisors, whose sum is σ = 231272. Its totient is φ = 231270.

The previous prime is 231269. The next prime is 231277. The reversal of 231271 is 172132.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231271 - 2¹ = 231269 is a prime.

Together with 231269, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231277) 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, 115635 + 115636.

It is an arithmetic number, because the mean of its divisors is an integer number (115636).

2²³¹²⁷¹ is an apocalyptic number.

231271 is a deficient number, since it is larger than the sum of its proper divisors (1).

231271 is an equidigital number, since it uses as much as digits as its factorization.

231271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84, while the sum is 16.

The square root of 231271 is about 480.9064358064. The cubic root of 231271 is about 61.3819092441.

The spelling of 231271 in words is "two hundred thirty-one thousand, two hundred seventy-one".