2516521521 has 8 divisors (see below), whose sum is σ = 3356426304. Its totient is φ = 1677148880.

The previous prime is 2516521459. The next prime is 2516521531. The reversal of 2516521521 is 1251256152.

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

It is a cyclic number.

It is not a de Polignac number, because 2516521521 - 2⁶ = 2516521457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2516521531) 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 7 ways as a sum of consecutive naturals, for example, 121866 + ... + 141011.

It is an arithmetic number, because the mean of its divisors is an integer number (419553288).

Almost surely, 2^2516521521 is an apocalyptic number.

It is an amenable number.

2516521521 is a deficient number, since it is larger than the sum of its proper divisors (839904783).

2516521521 is a wasteful number, since it uses less digits than its factorization.

2516521521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266071.

The product of its digits is 6000, while the sum is 30.

The square root of 2516521521 is about 50164.9431475807. The cubic root of 2516521521 is about 1360.1920001780.

Adding to 2516521521 its reverse (1251256152), we get a palindrome (3767777673).

The spelling of 2516521521 in words is "two billion, five hundred sixteen million, five hundred twenty-one thousand, five hundred twenty-one".