50537209 has 4 divisors (see below), whose sum is σ = 53510004. Its totient is φ = 47564416.

The previous prime is 50537197. The next prime is 50537213. The reversal of 50537209 is 90273505.

It is a happy number.

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 17875984 + 32661225 = 4228^2 + 5715^2 .

It is a cyclic number.

It is not a de Polignac number, because 50537209 - 2⁵ = 50537177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50537309) 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, 1486372 + ... + 1486405.

It is an arithmetic number, because the mean of its divisors is an integer number (13377501).

Almost surely, 2^50537209 is an apocalyptic number.

It is an amenable number.

50537209 is a deficient number, since it is larger than the sum of its proper divisors (2972795).

50537209 is a wasteful number, since it uses less digits than its factorization.

50537209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2972794.

The product of its (nonzero) digits is 9450, while the sum is 31.

The square root of 50537209 is about 7108.9527358114. The cubic root of 50537209 is about 369.7178491755.

The spelling of 50537209 in words is "fifty million, five hundred thirty-seven thousand, two hundred nine".