521543339130 has 128 divisors (see below), whose sum is σ = 1406078631936. Its totient is φ = 123744202560.

The previous prime is 521543339089. The next prime is 521543339131. The reversal of 521543339130 is 31933345125.

It is not an unprimeable number, because it can be changed into a prime (521543339131) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1737759 + ... + 2015661.

It is an arithmetic number, because the mean of its divisors is an integer number (10984989312).

Almost surely, 2^521543339130 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 521543339130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (703039315968).

521543339130 is an abundant number, since it is smaller than the sum of its proper divisors (884535292806).

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

521543339130 is a wasteful number, since it uses less digits than its factorization.

521543339130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277993 (or 277971 counting only the distinct ones).

The product of its (nonzero) digits is 145800, while the sum is 39.

The spelling of 521543339130 in words is "five hundred twenty-one billion, five hundred forty-three million, three hundred thirty-nine thousand, one hundred thirty".