2011530405 has 16 divisors (see below), whose sum is σ = 3219603264. Its totient is φ = 1072431360.

The previous prime is 2011530401. The next prime is 2011530413. The reversal of 2011530405 is 5040351102.

It is not a de Polignac number, because 2011530405 - 2² = 2011530401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011530401) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 21997 + ... + 67133.

It is an arithmetic number, because the mean of its divisors is an integer number (201225204).

Almost surely, 2^2011530405 is an apocalyptic number.

It is an amenable number.

2011530405 is a deficient number, since it is larger than the sum of its proper divisors (1208072859).

2011530405 is a wasteful number, since it uses less digits than its factorization.

2011530405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48116.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 2011530405 is about 44850.0881270037. The cubic root of 2011530405 is about 1262.3376451028.

Adding to 2011530405 its reverse (5040351102), we get a palindrome (7051881507).

The spelling of 2011530405 in words is "two billion, eleven million, five hundred thirty thousand, four hundred five".