50000221 has 2 divisors, whose sum is σ = 50000222. Its totient is φ = 50000220.

The previous prime is 50000207. The next prime is 50000231. The reversal of 50000221 is 12200005.

It is an a-pointer prime, because the next prime (50000231) can be obtained adding 50000221 to its sum of digits (10).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40819321 + 9180900 = 6389^2 + 3030^2 .

It is a cyclic number.

It is not a de Polignac number, because 50000221 - 2¹³ = 49992029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 50000198 and 50000207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50000201) 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, 25000110 + 25000111.

It is an arithmetic number, because the mean of its divisors is an integer number (25000111).

Almost surely, 2^50000221 is an apocalyptic number.

It is an amenable number.

50000221 is a deficient number, since it is larger than the sum of its proper divisors (1).

50000221 is an equidigital number, since it uses as much as digits as its factorization.

50000221 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 50000221 is about 7071.0834389081. The cubic root of 50000221 is about 368.4036926439.

Adding to 50000221 its reverse (12200005), we get a palindrome (62200226).

The spelling of 50000221 in words is "fifty million, two hundred twenty-one", and thus it is an aban number.