111422543 has 4 divisors (see below), whose sum is σ = 114140208. Its totient is φ = 108704880.

The previous prime is 111422533. The next prime is 111422569. The reversal of 111422543 is 345224111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 345224111 = 13931 ⋅24781.

It is a cyclic number.

It is not a de Polignac number, because 111422543 - 2⁴ = 111422527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111422513) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1358771 + ... + 1358852.

It is an arithmetic number, because the mean of its divisors is an integer number (28535052).

Almost surely, 2^111422543 is an apocalyptic number.

111422543 is a deficient number, since it is larger than the sum of its proper divisors (2717665).

111422543 is an equidigital number, since it uses as much as digits as its factorization.

111422543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2717664.

The product of its digits is 960, while the sum is 23.

The square root of 111422543 is about 10555.6877085295. The cubic root of 111422543 is about 481.1986002787.

Adding to 111422543 its reverse (345224111), we get a palindrome (456646654).

The spelling of 111422543 in words is "one hundred eleven million, four hundred twenty-two thousand, five hundred forty-three".