111143143 has 4 divisors (see below), whose sum is σ = 111165768. Its totient is φ = 111120520.

The previous prime is 111143119. The next prime is 111143171. The reversal of 111143143 is 341341111.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111143143 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111143143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111143113) 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, 496 + ... + 14917.

It is an arithmetic number, because the mean of its divisors is an integer number (27791442).

Almost surely, 2^111143143 is an apocalyptic number.

111143143 is a deficient number, since it is larger than the sum of its proper divisors (22625).

111143143 is an equidigital number, since it uses as much as digits as its factorization.

111143143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22624.

The product of its digits is 144, while the sum is 19.

The square root of 111143143 is about 10542.4448303038. Note that the first 3 decimals coincide. The cubic root of 111143143 is about 480.7960503084.

Adding to 111143143 its reverse (341341111), we get a palindrome (452484254).

The spelling of 111143143 in words is "one hundred eleven million, one hundred forty-three thousand, one hundred forty-three".