50120209 has 4 divisors (see below), whose sum is σ = 50439604. Its totient is φ = 49800816.

The previous prime is 50120177. The next prime is 50120251. The reversal of 50120209 is 90202105.

50120209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29463184 + 20657025 = 5428^2 + 4545^2 .

It is a cyclic number.

It is not a de Polignac number, because 50120209 - 2⁵ = 50120177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50120269) 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 in 3 ways as a sum of consecutive naturals, for example, 159462 + ... + 159775.

It is an arithmetic number, because the mean of its divisors is an integer number (12609901).

Almost surely, 2^50120209 is an apocalyptic number.

It is an amenable number.

50120209 is a deficient number, since it is larger than the sum of its proper divisors (319395).

50120209 is a wasteful number, since it uses less digits than its factorization.

50120209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319394.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 50120209 is about 7079.5627689851. The cubic root of 50120209 is about 368.6981494078.

The spelling of 50120209 in words is "fifty million, one hundred twenty thousand, two hundred nine".