520051520521 has 16 divisors (see below), whose sum is σ = 624210451200. Its totient is φ = 428030016768.

The previous prime is 520051520477. The next prime is 520051520533. The reversal of 520051520521 is 125025150025.

It is a cyclic number.

It is not a de Polignac number, because 520051520521 - 2⁷ = 520051520393 is a prime.

It is a super-2 number, since 2×520051520521² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 520051520521.

It is not an unprimeable number, because it can be changed into a prime (520051520551) 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, 61921441 + ... + 61929838.

It is an arithmetic number, because the mean of its divisors is an integer number (39013153200).

Almost surely, 2^520051520521 is an apocalyptic number.

It is an amenable number.

520051520521 is a deficient number, since it is larger than the sum of its proper divisors (104158930679).

520051520521 is a wasteful number, since it uses less digits than its factorization.

520051520521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123851328.

The product of its (nonzero) digits is 5000, while the sum is 28.

Adding to 520051520521 its reverse (125025150025), we get a palindrome (645076670546).

The spelling of 520051520521 in words is "five hundred twenty billion, fifty-one million, five hundred twenty thousand, five hundred twenty-one".