528534506821 has 2 divisors, whose sum is σ = 528534506822. Its totient is φ = 528534506820.

The previous prime is 528534506791. The next prime is 528534506831. The reversal of 528534506821 is 128605435825.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 303943818721 + 224590688100 = 551311^2 + 473910^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-528534506821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (528534506831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 264267253410 + 264267253411.

It is an arithmetic number, because the mean of its divisors is an integer number (264267253411).

Almost surely, 2^528534506821 is an apocalyptic number.

It is an amenable number.

528534506821 is a deficient number, since it is larger than the sum of its proper divisors (1).

528534506821 is an equidigital number, since it uses as much as digits as its factorization.

528534506821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304000, while the sum is 49.

The spelling of 528534506821 in words is "five hundred twenty-eight billion, five hundred thirty-four million, five hundred six thousand, eight hundred twenty-one".