111145543 has 2 divisors, whose sum is σ = 111145544. Its totient is φ = 111145542.

The previous prime is 111145519. The next prime is 111145597. The reversal of 111145543 is 345541111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111145543 - 2⁵ = 111145511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111146543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55572771 + 55572772.

It is an arithmetic number, because the mean of its divisors is an integer number (55572772).

Almost surely, 2^111145543 is an apocalyptic number.

111145543 is a deficient number, since it is larger than the sum of its proper divisors (1).

111145543 is an equidigital number, since it uses as much as digits as its factorization.

111145543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1200, while the sum is 25.

The square root of 111145543 is about 10542.5586552791. The cubic root of 111145543 is about 480.7995110174.

Adding to 111145543 its reverse (345541111), we get a palindrome (456686654).

The spelling of 111145543 in words is "one hundred eleven million, one hundred forty-five thousand, five hundred forty-three".