2011511243 has 8 divisors (see below), whose sum is σ = 2307053280. Its totient is φ = 1718015040.

The previous prime is 2011511237. The next prime is 2011511251. The reversal of 2011511243 is 3421151102.

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

It is not a de Polignac number, because 2011511243 - 2²⁰ = 2010462667 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2011561243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 509348 + ... + 513281.

It is an arithmetic number, because the mean of its divisors is an integer number (288381660).

Almost surely, 2^2011511243 is an apocalyptic number.

2011511243 is a deficient number, since it is larger than the sum of its proper divisors (295542037).

2011511243 is a wasteful number, since it uses less digits than its factorization.

2011511243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1022917.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 2011511243 is about 44849.8745037263. The cubic root of 2011511243 is about 1262.3336367136. Note that the first 3 decimals are identical.

Adding to 2011511243 its reverse (3421151102), we get a palindrome (5432662345).

The spelling of 2011511243 in words is "two billion, eleven million, five hundred eleven thousand, two hundred forty-three".