2011515520 has 64 divisors (see below), whose sum is σ = 5495760000. Its totient is φ = 689660928.

The previous prime is 2011515509. The next prime is 2011515521. The reversal of 2011515520 is 255151102.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 2011515491 and 2011515500.

It is not an unprimeable number, because it can be changed into a prime (2011515521) 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, 220020 + ... + 228979.

It is an arithmetic number, because the mean of its divisors is an integer number (85871250).

Almost surely, 2^2011515520 is an apocalyptic number.

2011515520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2011515520 is an abundant number, since it is smaller than the sum of its proper divisors (3484244480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2011515520 is an equidigital number, since it uses as much as digits as its factorization.

2011515520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449025 (or 449013 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 22.

The square root of 2011515520 is about 44849.9221849938. The cubic root of 2011515520 is about 1262.3345313970.

Adding to 2011515520 its reverse (255151102), we get a palindrome (2266666622).

The spelling of 2011515520 in words is "two billion, eleven million, five hundred fifteen thousand, five hundred twenty".