231943 has 2 divisors, whose sum is σ = 231944. Its totient is φ = 231942.

The previous prime is 231923. The next prime is 231947. The reversal of 231943 is 349132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231943 - 2⁹ = 231431 is a prime.

It is equal to p₂₀₅₉₆ and since 231943 and 20596 have the same sum of digits, it is a Honaker prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115971 + 115972.

It is an arithmetic number, because the mean of its divisors is an integer number (115972).

2²³¹⁹⁴³ is an apocalyptic number.

231943 is a deficient number, since it is larger than the sum of its proper divisors (1).

231943 is an equidigital number, since it uses as much as digits as its factorization.

231943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 22.

The square root of 231943 is about 481.6046096125. The cubic root of 231943 is about 61.4413038585.

The spelling of 231943 in words is "two hundred thirty-one thousand, nine hundred forty-three".