521430528 has 160 divisors (see below), whose sum is σ = 1549722240. Its totient is φ = 154828800.

The previous prime is 521430523. The next prime is 521430541. The reversal of 521430528 is 825034125.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 521430495 and 521430504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521430521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 495603 + ... + 496653.

It is an arithmetic number, because the mean of its divisors is an integer number (9685764).

Almost surely, 2^521430528 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 521430528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (774861120).

521430528 is an abundant number, since it is smaller than the sum of its proper divisors (1028291712).

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

521430528 is a wasteful number, since it uses less digits than its factorization.

521430528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1108 (or 1092 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 521430528 is about 22834.8533605977. The cubic root of 521430528 is about 804.8818817730.

The spelling of 521430528 in words is "five hundred twenty-one million, four hundred thirty thousand, five hundred twenty-eight".