50221 has 2 divisors, whose sum is σ = 50222. Its totient is φ = 50220.

The previous prime is 50207. The next prime is 50227. The reversal of 50221 is 12205.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34596 + 15625 = 186^2 + 125^2 .

It is a cyclic number.

It is not a de Polignac number, because 50221 - 2⁷ = 50093 is a prime.

It is a Chen prime.

It is a nialpdrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 50198 and 50207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25110 + 25111.

It is an arithmetic number, because the mean of its divisors is an integer number (25111).

2⁵⁰²²¹ is an apocalyptic number.

It is an amenable number.

50221 is a deficient number, since it is larger than the sum of its proper divisors (1).

50221 is an equidigital number, since it uses as much as digits as its factorization.

50221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20, while the sum is 10.

The square root of 50221 is about 224.1004239175. The cubic root of 50221 is about 36.8945132766.

Adding to 50221 its reverse (12205), we get a palindrome (62426).

The spelling of 50221 in words is "fifty thousand, two hundred twenty-one".