50421209 has 2 divisors, whose sum is σ = 50421210. Its totient is φ = 50421208.

The previous prime is 50421199. The next prime is 50421211. The reversal of 50421209 is 90212405.

50421209 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., 35366809 + 15054400 = 5947^2 + 3880^2 .

It is a cyclic number.

It is not a de Polignac number, because 50421209 - 2¹⁶ = 50355673 is a prime.

Together with 50421211, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (50421229) 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, 25210604 + 25210605.

It is an arithmetic number, because the mean of its divisors is an integer number (25210605).

Almost surely, 2^50421209 is an apocalyptic number.

It is an amenable number.

50421209 is a deficient number, since it is larger than the sum of its proper divisors (1).

50421209 is an equidigital number, since it uses as much as digits as its factorization.

50421209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 50421209 is about 7100.7893223219. The cubic root of 50421209 is about 369.4347565997.

The spelling of 50421209 in words is "fifty million, four hundred twenty-one thousand, two hundred nine".