111143424 has 80 divisors (see below), whose sum is σ = 338424768. Its totient is φ = 31752192.

The previous prime is 111143411. The next prime is 111143453. The reversal of 111143424 is 424341111.

111143424 is nontrivially palindromic in base 15.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 111143424.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5584 + ... + 15920.

Almost surely, 2^111143424 is an apocalyptic number.

111143424 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111143424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169212384).

111143424 is an abundant number, since it is smaller than the sum of its proper divisors (227281344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111143424 is an equidigital number, since it uses as much as digits as its factorization.

111143424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10365 (or 10349 counting only the distinct ones).

The product of its digits is 384, while the sum is 21.

The square root of 111143424 is about 10542.4581573749. The cubic root of 111143424 is about 480.7964555023.

Adding to 111143424 its reverse (424341111), we get a palindrome (535484535).

The spelling of 111143424 in words is "one hundred eleven million, one hundred forty-three thousand, four hundred twenty-four".