2111143 has 4 divisors (see below), whose sum is σ = 2114128. Its totient is φ = 2108160.

The previous prime is 2111129. The next prime is 2111159. The reversal of 2111143 is 3411112.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2111143 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 (2111443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 238 + ... + 2068.

It is an arithmetic number, because the mean of its divisors is an integer number (528532).

2^2111143 is an apocalyptic number.

2111143 is a deficient number, since it is larger than the sum of its proper divisors (2985).

2111143 is a wasteful number, since it uses less digits than its factorization.

2111143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2984.

The product of its digits is 24, while the sum is 13.

The square root of 2111143 is about 1452.9772881914. The cubic root of 2111143 is about 128.2840169573.

Adding to 2111143 its reverse (3411112), we get a palindrome (5522255).

The spelling of 2111143 in words is "two million, one hundred eleven thousand, one hundred forty-three".