530928221 has 2 divisors, whose sum is σ = 530928222. Its totient is φ = 530928220.

The previous prime is 530928163. The next prime is 530928253. The reversal of 530928221 is 122829035.

It is a happy number.

It is an a-pointer prime, because the next prime (530928253) can be obtained adding 530928221 to its sum of digits (32).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 504002500 + 26925721 = 22450^2 + 5189^2 .

It is a cyclic number.

It is not a de Polignac number, because 530928221 - 2²² = 526733917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (530928421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265464110 + 265464111.

It is an arithmetic number, because the mean of its divisors is an integer number (265464111).

Almost surely, 2^530928221 is an apocalyptic number.

It is an amenable number.

530928221 is a deficient number, since it is larger than the sum of its proper divisors (1).

530928221 is an equidigital number, since it uses as much as digits as its factorization.

530928221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 530928221 is about 23041.8797193285. The cubic root of 530928221 is about 809.7393974432.

The spelling of 530928221 in words is "five hundred thirty million, nine hundred twenty-eight thousand, two hundred twenty-one".