50815809 has 64 divisors (see below), whose sum is σ = 88197120. Its totient is φ = 28607040.

The previous prime is 50815783. The next prime is 50815841. The reversal of 50815809 is 90851805.

It is not a de Polignac number, because 50815809 - 2⁵ = 50815777 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50815889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 293647 + ... + 293819.

It is an arithmetic number, because the mean of its divisors is an integer number (1378080).

Almost surely, 2^50815809 is an apocalyptic number.

It is an amenable number.

50815809 is a deficient number, since it is larger than the sum of its proper divisors (37381311).

50815809 is a wasteful number, since it uses less digits than its factorization.

50815809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259 (or 253 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 36.

The square root of 50815809 is about 7128.5208143064. The cubic root of 50815809 is about 370.3959943441.

The spelling of 50815809 in words is "fifty million, eight hundred fifteen thousand, eight hundred nine".