52030021 has 2 divisors, whose sum is σ = 52030022. Its totient is φ = 52030020.

The previous prime is 52030009. The next prime is 52030039. The reversal of 52030021 is 12003025.

52030021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47128225 + 4901796 = 6865^2 + 2214^2 .

It is a cyclic number.

It is not a de Polignac number, because 52030021 - 2¹⁷ = 51898949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 52029983 and 52030010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52030001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26015010 + 26015011.

It is an arithmetic number, because the mean of its divisors is an integer number (26015011).

Almost surely, 2^52030021 is an apocalyptic number.

It is an amenable number.

52030021 is a deficient number, since it is larger than the sum of its proper divisors (1).

52030021 is an equidigital number, since it uses as much as digits as its factorization.

52030021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 52030021 is about 7213.1838324002. The cubic root of 52030021 is about 373.3229311692.

Adding to 52030021 its reverse (12003025), we get a palindrome (64033046).

The spelling of 52030021 in words is "fifty-two million, thirty thousand, twenty-one".