50821205 has 4 divisors (see below), whose sum is σ = 60985452. Its totient is φ = 40656960.

The previous prime is 50821171. The next prime is 50821229. The reversal of 50821205 is 50212805.

50821205 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 24216241 + 26604964 = 4921^2 + 5158^2 .

It is not a de Polignac number, because 50821205 - 2⁸ = 50820949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 5082116 + ... + 5082125.

It is an arithmetic number, because the mean of its divisors is an integer number (15246363).

Almost surely, 2^50821205 is an apocalyptic number.

It is an amenable number.

50821205 is a deficient number, since it is larger than the sum of its proper divisors (10164247).

50821205 is a wasteful number, since it uses less digits than its factorization.

50821205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10164246.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 50821205 is about 7128.8992839007. The cubic root of 50821205 is about 370.4091043459.

Subtracting from 50821205 its reverse (50212805), we obtain a square (608400 = 780²).

The spelling of 50821205 in words is "fifty million, eight hundred twenty-one thousand, two hundred five".