50040209 has 4 divisors (see below), whose sum is σ = 50405604. Its totient is φ = 49674816.

The previous prime is 50040149. The next prime is 50040227. The reversal of 50040209 is 90204005.

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 43033600 + 7006609 = 6560^2 + 2647^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50040209 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (50040229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182492 + ... + 182765.

It is an arithmetic number, because the mean of its divisors is an integer number (12601401).

Almost surely, 2^50040209 is an apocalyptic number.

It is an amenable number.

50040209 is a deficient number, since it is larger than the sum of its proper divisors (365395).

50040209 is a wasteful number, since it uses less digits than its factorization.

50040209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365394.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 50040209 is about 7073.9104461394. The cubic root of 50040209 is about 368.5018775522.

The spelling of 50040209 in words is "fifty million, forty thousand, two hundred nine".