52250021 has 2 divisors, whose sum is σ = 52250022. Its totient is φ = 52250020.

The previous prime is 52249991. The next prime is 52250039. The reversal of 52250021 is 12005225.

52250021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37149025 + 15100996 = 6095^2 + 3886^2 .

It is a cyclic number.

It is not a de Polignac number, because 52250021 - 2¹⁴ = 52233637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52250621) 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, 26125010 + 26125011.

It is an arithmetic number, because the mean of its divisors is an integer number (26125011).

Almost surely, 2^52250021 is an apocalyptic number.

It is an amenable number.

52250021 is a deficient number, since it is larger than the sum of its proper divisors (1).

52250021 is an equidigital number, since it uses as much as digits as its factorization.

52250021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 52250021 is about 7228.4176000007. The cubic root of 52250021 is about 373.8483685702.

Adding to 52250021 its reverse (12005225), we get a palindrome (64255246).

The spelling of 52250021 in words is "fifty-two million, two hundred fifty thousand, twenty-one".