239231 has 2 divisors, whose sum is σ = 239232. Its totient is φ = 239230.

The previous prime is 239201. The next prime is 239233. The reversal of 239231 is 132932.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 239231 - 2⁶ = 239167 is a prime.

It is a super-2 number, since 2×239231² = 114462942722, which contains 22 as substring.

Together with 239233, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 239231.

It is not a weakly prime, because it can be changed into another prime (239233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119615 + 119616.

It is an arithmetic number, because the mean of its divisors is an integer number (119616).

2²³⁹²³¹ is an apocalyptic number.

239231 is a deficient number, since it is larger than the sum of its proper divisors (1).

239231 is an equidigital number, since it uses as much as digits as its factorization.

239231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 324, while the sum is 20.

The square root of 239231 is about 489.1124615055. The cubic root of 239231 is about 62.0782051628.

The spelling of 239231 in words is "two hundred thirty-nine thousand, two hundred thirty-one".