528243561 has 24 divisors (see below), whose sum is σ = 785608200. Its totient is φ = 341784576.

The previous prime is 528243523. The next prime is 528243577. The reversal of 528243561 is 165342825.

528243561 is a `hidden beast` number, since 52 + 8 + 2 + 43 + 561 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 297355536 + 230888025 = 17244^2 + 15195^2 .

It is not a de Polignac number, because 528243561 - 2⁹ = 528243049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (528243511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 147751 + ... + 151283.

It is an arithmetic number, because the mean of its divisors is an integer number (32733675).

Almost surely, 2^528243561 is an apocalyptic number.

It is an amenable number.

528243561 is a deficient number, since it is larger than the sum of its proper divisors (257364639).

528243561 is a wasteful number, since it uses less digits than its factorization.

528243561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4025 (or 4022 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The square root of 528243561 is about 22983.5497911006. The cubic root of 528243561 is about 808.3722638659.

The spelling of 528243561 in words is "five hundred twenty-eight million, two hundred forty-three thousand, five hundred sixty-one".