231347 has 2 divisors, whose sum is σ = 231348. Its totient is φ = 231346.

The previous prime is 231331. The next prime is 231349. The reversal of 231347 is 743132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231347 - 2⁴ = 231331 is a prime.

Together with 231349, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (231349) 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, 115673 + 115674.

It is an arithmetic number, because the mean of its divisors is an integer number (115674).

2²³¹³⁴⁷ is an apocalyptic number.

231347 is a deficient number, since it is larger than the sum of its proper divisors (1).

231347 is an equidigital number, since it uses as much as digits as its factorization.

231347 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 504, while the sum is 20.

The square root of 231347 is about 480.9854467653. The cubic root of 231347 is about 61.3886322576.

Adding to 231347 its reverse (743132), we get a palindrome (974479).

The spelling of 231347 in words is "two hundred thirty-one thousand, three hundred forty-seven".