2011505243 has 16 divisors (see below), whose sum is σ = 2312461440. Its totient is φ = 1730448000.

The previous prime is 2011505239. The next prime is 2011505257. The reversal of 2011505243 is 3425051102.

It is a cyclic number.

It is not a de Polignac number, because 2011505243 - 2² = 2011505239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2011505843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 199268 + ... + 209118.

It is an arithmetic number, because the mean of its divisors is an integer number (144528840).

Almost surely, 2^2011505243 is an apocalyptic number.

2011505243 is a deficient number, since it is larger than the sum of its proper divisors (300956197).

2011505243 is a wasteful number, since it uses less digits than its factorization.

2011505243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10858.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 2011505243 is about 44849.8076138572. The cubic root of 2011505243 is about 1262.3323816026.

Adding to 2011505243 its reverse (3425051102), we get a palindrome (5436556345).

The spelling of 2011505243 in words is "two billion, eleven million, five hundred five thousand, two hundred forty-three".