521086020 has 192 divisors, whose sum is σ = 1890631680. Its totient is φ = 104136192.

The previous prime is 521086003. The next prime is 521086021. The reversal of 521086020 is 20680125.

It is not an unprimeable number, because it can be changed into a prime (521086021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 101229 + ... + 106251.

It is an arithmetic number, because the mean of its divisors is an integer number (9847040).

Almost surely, 2^521086020 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 521086020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (945315840).

521086020 is an abundant number, since it is smaller than the sum of its proper divisors (1369545660).

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

521086020 is a wasteful number, since it uses less digits than its factorization.

521086020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5074 (or 5072 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 521086020 is about 22827.3086455675. The cubic root of 521086020 is about 804.7045814918.

The spelling of 521086020 in words is "five hundred twenty-one million, eighty-six thousand, twenty".