2011320443 has 12 divisors (see below), whose sum is σ = 2248269240. Its totient is φ = 1797475680.

The previous prime is 2011320431. The next prime is 2011320457. The reversal of 2011320443 is 3440231102.

It is not a de Polignac number, because 2011320443 - 2⁸ = 2011320187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2011320043) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 133730 + ... + 148007.

It is an arithmetic number, because the mean of its divisors is an integer number (187355770).

Almost surely, 2^2011320443 is an apocalyptic number.

2011320443 is a deficient number, since it is larger than the sum of its proper divisors (236948797).

2011320443 is a wasteful number, since it uses less digits than its factorization.

2011320443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281818 (or 281807 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 2011320443 is about 44847.7473570301. The cubic root of 2011320443 is about 1262.2937229631.

Adding to 2011320443 its reverse (3440231102), we get a palindrome (5451551545).

The spelling of 2011320443 in words is "two billion, eleven million, three hundred twenty thousand, four hundred forty-three".