111541143 has 16 divisors (see below), whose sum is σ = 170213120. Its totient is φ = 63645696.

The previous prime is 111541139. The next prime is 111541151. The reversal of 111541143 is 341145111.

It is not a de Polignac number, because 111541143 - 2² = 111541139 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111541043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12696 + ... + 19602.

It is an arithmetic number, because the mean of its divisors is an integer number (10638320).

Almost surely, 2^111541143 is an apocalyptic number.

111541143 is a deficient number, since it is larger than the sum of its proper divisors (58671977).

111541143 is an equidigital number, since it uses as much as digits as its factorization.

111541143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7686.

The product of its digits is 240, while the sum is 21.

The square root of 111541143 is about 10561.3040388013. The cubic root of 111541143 is about 481.3692716576.

Adding to 111541143 its reverse (341145111), we get a palindrome (452686254).

The spelling of 111541143 in words is "one hundred eleven million, five hundred forty-one thousand, one hundred forty-three".