528032221 has 2 divisors, whose sum is σ = 528032222. Its totient is φ = 528032220.

The previous prime is 528032209. The next prime is 528032231. The reversal of 528032221 is 122230825.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 383768100 + 144264121 = 19590^2 + 12011^2 .

It is a cyclic number.

It is not a de Polignac number, because 528032221 - 2⁹ = 528031709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (528032231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 264016110 + 264016111.

It is an arithmetic number, because the mean of its divisors is an integer number (264016111).

Almost surely, 2^528032221 is an apocalyptic number.

It is an amenable number.

528032221 is a deficient number, since it is larger than the sum of its proper divisors (1).

528032221 is an equidigital number, since it uses as much as digits as its factorization.

528032221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 528032221 is about 22978.9516949751. The cubic root of 528032221 is about 808.2644447994.

The spelling of 528032221 in words is "five hundred twenty-eight million, thirty-two thousand, two hundred twenty-one".