3111443 has 4 divisors (see below), whose sum is σ = 3118320. Its totient is φ = 3104568.

The previous prime is 3111431. The next prime is 3111457. The reversal of 3111443 is 3441113.

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 3111443 - 2¹⁸ = 2849299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3111403) 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, 2708 + ... + 3681.

It is an arithmetic number, because the mean of its divisors is an integer number (779580).

Almost surely, 2^3111443 is an apocalyptic number.

3111443 is a deficient number, since it is larger than the sum of its proper divisors (6877).

3111443 is an equidigital number, since it uses as much as digits as its factorization.

3111443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6876.

The product of its digits is 144, while the sum is 17.

The square root of 3111443 is about 1763.9282865241. The cubic root of 3111443 is about 145.9891622655.

Adding to 3111443 its reverse (3441113), we get a palindrome (6552556).

The spelling of 3111443 in words is "three million, one hundred eleven thousand, four hundred forty-three".