231443 has 2 divisors, whose sum is σ = 231444. Its totient is φ = 231442.

The previous prime is 231433. The next prime is 231461. The reversal of 231443 is 344132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231443 - 2⁶ = 231379 is a prime.

It is a Sophie Germain prime.

It is equal to p₂₀₅₅₅ and since 231443 and 20555 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (231433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115721 + 115722.

It is an arithmetic number, because the mean of its divisors is an integer number (115722).

2²³¹⁴⁴³ is an apocalyptic number.

231443 is a deficient number, since it is larger than the sum of its proper divisors (1).

231443 is an equidigital number, since it uses as much as digits as its factorization.

231443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 17.

The square root of 231443 is about 481.0852315339. The cubic root of 231443 is about 61.3971223810.

Adding to 231443 its reverse (344132), we get a palindrome (575575).

The spelling of 231443 in words is "two hundred thirty-one thousand, four hundred forty-three".