111144543 has 4 divisors (see below), whose sum is σ = 148192728. Its totient is φ = 74096360.

The previous prime is 111144511. The next prime is 111144577. The reversal of 111144543 is 345441111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 345441111 = 3 ⋅115147037.

It is a cyclic number.

It is not a de Polignac number, because 111144543 - 2⁵ = 111144511 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111144343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18524088 + ... + 18524093.

It is an arithmetic number, because the mean of its divisors is an integer number (37048182).

Almost surely, 2^111144543 is an apocalyptic number.

111144543 is a deficient number, since it is larger than the sum of its proper divisors (37048185).

111144543 is an equidigital number, since it uses as much as digits as its factorization.

111144543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37048184.

The product of its digits is 960, while the sum is 24.

The square root of 111144543 is about 10542.5112283554. The cubic root of 111144543 is about 480.7980690614.

Adding to 111144543 its reverse (345441111), we get a palindrome (456585654).

It can be divided in two parts, 1111 and 44543, that added together give a palindrome (45654).

The spelling of 111144543 in words is "one hundred eleven million, one hundred forty-four thousand, five hundred forty-three".