2143 has 2 divisors, whose sum is σ = 2144.
Its totient is φ = 2142.
The previous prime is 2141. The next prime is 2153. The reversal of 2143 is 3412.
Adding to 2143 its reverse (3412), we get a palindrome (5555).
It can be divided in two parts, 21 and 43, that multiplied together give a triangular number (903 = T42).
2143 is nontrivially palindromic in base 6.
It is an a-pointer prime, because the next prime (2153) can be obtained adding 2143 to its sum of digits (10).
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 2143 - 21 = 2141 is a prime.
Together with 2141, it forms a pair of twin primes.
It is an alternating number because its digits alternate between even and odd.
It is a plaindrome in base 11.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (2141) 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, 1071 + 1072.
It is an arithmetic number, because the mean of its divisors is an integer number (1072).
22143 is an apocalyptic number.
2143 is a deficient number, since it is larger than the sum of its proper divisors (1).
2143 is an equidigital number, since it uses as much as digits as its factorization.
2143 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 24, while the sum is 10.
The square root of 2143 is about 46.2925479964.
The cubic root of 2143 is about 12.8926063835.
The spelling of 2143 in words is "two thousand, one hundred forty-three", and thus it is an iban number.