4530530021 has 2 divisors, whose sum is σ = 4530530022. Its totient is φ = 4530530020.

The previous prime is 4530529987. The next prime is 4530530027. The reversal of 4530530021 is 1200350354.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4428237025 + 102292996 = 66545^2 + 10114^2 .

It is a cyclic number.

It is not a de Polignac number, because 4530530021 - 2¹⁰ = 4530528997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4530530027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2265265010 + 2265265011.

It is an arithmetic number, because the mean of its divisors is an integer number (2265265011).

Almost surely, 2^4530530021 is an apocalyptic number.

It is an amenable number.

4530530021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4530530021 is an equidigital number, since it uses as much as digits as its factorization.

4530530021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 4530530021 is about 67309.2120069757. The cubic root of 4530530021 is about 1654.6888388280.

Adding to 4530530021 its reverse (1200350354), we get a palindrome (5730880375).

The spelling of 4530530021 in words is "four billion, five hundred thirty million, five hundred thirty thousand, twenty-one".