111312443 has 4 divisors (see below), whose sum is σ = 121431768. Its totient is φ = 101193120.

The previous prime is 111312427. The next prime is 111312463. The reversal of 111312443 is 344213111.

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

It is a cyclic number.

It is not a de Polignac number, because 111312443 - 2⁴ = 111312427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111312463) 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, 5059646 + ... + 5059667.

It is an arithmetic number, because the mean of its divisors is an integer number (30357942).

Almost surely, 2^111312443 is an apocalyptic number.

111312443 is a deficient number, since it is larger than the sum of its proper divisors (10119325).

111312443 is a wasteful number, since it uses less digits than its factorization.

111312443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10119324.

The product of its digits is 288, while the sum is 20.

The square root of 111312443 is about 10550.4712217038. The cubic root of 111312443 is about 481.0400523930.

Adding to 111312443 its reverse (344213111), we get a palindrome (455525554).

The spelling of 111312443 in words is "one hundred eleven million, three hundred twelve thousand, four hundred forty-three".