111143823 has 16 divisors (see below), whose sum is σ = 171267840. Its totient is φ = 62796096.

The previous prime is 111143801. The next prime is 111143831. The reversal of 111143823 is 328341111.

It is not a de Polignac number, because 111143823 - 2⁹ = 111143311 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111143793 and 111143802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111143023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27865 + ... + 31602.

It is an arithmetic number, because the mean of its divisors is an integer number (10704240).

Almost surely, 2^111143823 is an apocalyptic number.

111143823 is a deficient number, since it is larger than the sum of its proper divisors (60124017).

111143823 is an equidigital number, since it uses as much as digits as its factorization.

111143823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59566.

The product of its digits is 576, while the sum is 24.

The square root of 111143823 is about 10542.4770808383. The cubic root of 111143823 is about 480.7970308477.

Adding to 111143823 its reverse (328341111), we get a palindrome (439484934).

The spelling of 111143823 in words is "one hundred eleven million, one hundred forty-three thousand, eight hundred twenty-three".