2011243405 has 8 divisors (see below), whose sum is σ = 2436924672. Its totient is φ = 1593373008.

The previous prime is 2011243379. The next prime is 2011243427. The reversal of 2011243405 is 5043421102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2011243405 - 2¹⁵ = 2011210637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1952149 + ... + 1953178.

It is an arithmetic number, because the mean of its divisors is an integer number (304615584).

Almost surely, 2^2011243405 is an apocalyptic number.

It is an amenable number.

2011243405 is a deficient number, since it is larger than the sum of its proper divisors (425681267).

2011243405 is a wasteful number, since it uses less digits than its factorization.

2011243405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3905435.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 2011243405 is about 44846.8884650875. Note that the first 3 decimals coincide. The cubic root of 2011243405 is about 1262.2776065480.

Adding to 2011243405 its reverse (5043421102), we get a palindrome (7054664507).

The spelling of 2011243405 in words is "two billion, eleven million, two hundred forty-three thousand, four hundred five".