231143 has 4 divisors (see below), whose sum is σ = 252168. Its totient is φ = 210120.

The previous prime is 231131. The next prime is 231169. The reversal of 231143 is 341132.

231143 is nontrivially palindromic in base 12.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 231143 - 2⁶ = 231079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231443) 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 in 3 ways as a sum of consecutive naturals, for example, 10496 + ... + 10517.

It is an arithmetic number, because the mean of its divisors is an integer number (63042).

2²³¹¹⁴³ is an apocalyptic number.

231143 is a deficient number, since it is larger than the sum of its proper divisors (21025).

231143 is a wasteful number, since it uses less digits than its factorization.

231143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21024.

The product of its digits is 72, while the sum is 14.

The square root of 231143 is about 480.7733353671. The cubic root of 231143 is about 61.3705829439.

Adding to 231143 its reverse (341132), we get a palindrome (572275).

It can be divided in two parts, 231 and 143, that multiplied together give a palindrome (33033).

The spelling of 231143 in words is "two hundred thirty-one thousand, one hundred forty-three".