520621522352 has 80 divisors (see below), whose sum is σ = 1071410487840. Its totient is φ = 244648943616.

The previous prime is 520621522339. The next prime is 520621522363. The reversal of 520621522352 is 253225126025.

It is a super-3 number, since 3×520621522352³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5801408 + ... + 5890464.

It is an arithmetic number, because the mean of its divisors is an integer number (13392631098).

Almost surely, 2^520621522352 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 520621522352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (535705243920).

520621522352 is an abundant number, since it is smaller than the sum of its proper divisors (550788965488).

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

520621522352 is a wasteful number, since it uses less digits than its factorization.

520621522352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89430 (or 89424 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 35.

Adding to 520621522352 its reverse (253225126025), we get a palindrome (773846648377).

The spelling of 520621522352 in words is "five hundred twenty billion, six hundred twenty-one million, five hundred twenty-two thousand, three hundred fifty-two".