521125352052 has 72 divisors (see below), whose sum is σ = 1283770051200. Its totient is φ = 164508872832.

The previous prime is 521125352029. The next prime is 521125352057. The reversal of 521125352052 is 250253521125.

It is a super-2 number, since 2×521125352052² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521125352057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13492224 + ... + 13530792.

It is an arithmetic number, because the mean of its divisors is an integer number (17830139600).

Almost surely, 2^521125352052 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 521125352052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (641885025600).

521125352052 is an abundant number, since it is smaller than the sum of its proper divisors (762644699148).

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

521125352052 is a wasteful number, since it uses less digits than its factorization.

521125352052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41733 (or 41712 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 33.

Adding to 521125352052 its reverse (250253521125), we get a palindrome (771378873177).

The spelling of 521125352052 in words is "five hundred twenty-one billion, one hundred twenty-five million, three hundred fifty-two thousand, fifty-two".