2001515520 has 88 divisors (see below), whose sum is σ = 6401771424. Its totient is φ = 533733376.

The previous prime is 2001515513. The next prime is 2001515543. The reversal of 2001515520 is 255151002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49794 + ... + 80513.

Almost surely, 2^2001515520 is an apocalyptic number.

2001515520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001515520 is an abundant number, since it is smaller than the sum of its proper divisors (4400255904).

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

2001515520 is a wasteful number, since it uses less digits than its factorization.

2001515520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130335 (or 130317 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 2001515520 is about 44738.3003700409. The cubic root of 2001515520 is about 1260.2392088040.

Adding to 2001515520 its reverse (255151002), we get a palindrome (2256666522).

The spelling of 2001515520 in words is "two billion, one million, five hundred fifteen thousand, five hundred twenty".