2011520085 has 16 divisors (see below), whose sum is σ = 3358364544. Its totient is φ = 1026166592.

The previous prime is 2011520057. The next prime is 2011520089. The reversal of 2011520085 is 5800251102.

It is a cyclic number.

It is not a de Polignac number, because 2011520085 - 2¹⁰ = 2011519061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011520089) 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 15 ways as a sum of consecutive naturals, for example, 2914902 + ... + 2915591.

It is an arithmetic number, because the mean of its divisors is an integer number (209897784).

Almost surely, 2^2011520085 is an apocalyptic number.

It is an amenable number.

2011520085 is a deficient number, since it is larger than the sum of its proper divisors (1346844459).

2011520085 is a wasteful number, since it uses less digits than its factorization.

2011520085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5830524.

The product of its (nonzero) digits is 800, while the sum is 24.

The square root of 2011520085 is about 44849.9730769150. The cubic root of 2011520085 is about 1262.3354863242.

Adding to 2011520085 its reverse (5800251102), we get a palindrome (7811771187).

The spelling of 2011520085 in words is "two billion, eleven million, five hundred twenty thousand, eighty-five".