2011503843 has 6 divisors (see below), whose sum is σ = 2905505564. Its totient is φ = 1341002556.

The previous prime is 2011503817. The next prime is 2011503917. The reversal of 2011503843 is 3483051102.

It is a happy number.

It is not a de Polignac number, because 2011503843 - 2²² = 2007309539 is a prime.

It is a super-2 number, since 2×2011503843² = 8092295420807537298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2011503443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 111750205 + ... + 111750222.

Almost surely, 2^2011503843 is an apocalyptic number.

2011503843 is a deficient number, since it is larger than the sum of its proper divisors (894001721).

2011503843 is a wasteful number, since it uses less digits than its factorization.

2011503843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223500433 (or 223500430 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 2011503843 is about 44849.7920062067. The cubic root of 2011503843 is about 1262.3320887430.

Adding to 2011503843 its reverse (3483051102), we get a palindrome (5494554945).

The spelling of 2011503843 in words is "two billion, eleven million, five hundred three thousand, eight hundred forty-three".