111445423 has 4 divisors (see below), whose sum is σ = 111936600. Its totient is φ = 110954248.

The previous prime is 111445417. The next prime is 111445427. The reversal of 111445423 is 324544111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111445423 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 (111445427) 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, 245248 + ... + 245701.

It is an arithmetic number, because the mean of its divisors is an integer number (27984150).

Almost surely, 2^111445423 is an apocalyptic number.

111445423 is a deficient number, since it is larger than the sum of its proper divisors (491177).

111445423 is an equidigital number, since it uses as much as digits as its factorization.

111445423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491176.

The product of its digits is 1920, while the sum is 25.

The square root of 111445423 is about 10556.7714288034. The cubic root of 111445423 is about 481.2315351773.

Adding to 111445423 its reverse (324544111), we get a palindrome (435989534).

The spelling of 111445423 in words is "one hundred eleven million, four hundred forty-five thousand, four hundred twenty-three".