2171143 has 12 divisors (see below), whose sum is σ = 2437560. Its totient is φ = 1930656.

The previous prime is 2171119. The next prime is 2171159. The reversal of 2171143 is 3411712.

It is a de Polignac number, because none of the positive numbers 2^k-2171143 is a prime.

It is a Duffinian number.

2171143 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2171143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2171243) 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 in 11 ways as a sum of consecutive naturals, for example, 4680 + ... + 5122.

It is an arithmetic number, because the mean of its divisors is an integer number (203130).

2^2171143 is an apocalyptic number.

2171143 is a deficient number, since it is larger than the sum of its proper divisors (266417).

2171143 is a wasteful number, since it uses less digits than its factorization.

2171143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498 (or 485 counting only the distinct ones).

The product of its digits is 168, while the sum is 19.

The square root of 2171143 is about 1473.4798946711. The cubic root of 2171143 is about 129.4879860453.

Adding to 2171143 its reverse (3411712), we get a palindrome (5582855).

The spelling of 2171143 in words is "two million, one hundred seventy-one thousand, one hundred forty-three".