521201280 has 256 divisors, whose sum is σ = 1744934400. Its totient is φ = 132206592.

The previous prime is 521201279. The next prime is 521201297. The reversal of 521201280 is 82102125.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4870987 + ... + 4871093.

It is an arithmetic number, because the mean of its divisors is an integer number (6816150).

Almost surely, 2^521201280 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 521201280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (872467200).

521201280 is an abundant number, since it is smaller than the sum of its proper divisors (1223733120).

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

521201280 is a wasteful number, since it uses less digits than its factorization.

521201280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231 (or 219 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 521201280 is about 22829.8331137133. The cubic root of 521201280 is about 804.7639084927.

The spelling of 521201280 in words is "five hundred twenty-one million, two hundred one thousand, two hundred eighty".