50821636 has 12 divisors (see below), whose sum is σ = 94169628. Its totient is φ = 23916032.

The previous prime is 50821633. The next prime is 50821649. The reversal of 50821636 is 63612805.

It can be written as a sum of positive squares in 2 ways, for example, as 43639236 + 7182400 = 6606^2 + 2680^2 .

It is a junction number, because it is equal to n+sod(n) for n = 50821598 and 50821607.

It is not an unprimeable number, because it can be changed into a prime (50821633) 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 3 ways as a sum of consecutive naturals, for example, 373621 + ... + 373756.

It is an arithmetic number, because the mean of its divisors is an integer number (7847469).

Almost surely, 2^50821636 is an apocalyptic number.

It is an amenable number.

50821636 is a deficient number, since it is larger than the sum of its proper divisors (43347992).

50821636 is a wasteful number, since it uses less digits than its factorization.

50821636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747398 (or 747396 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 50821636 is about 7128.9295129072. The cubic root of 50821636 is about 370.4101514539.

The spelling of 50821636 in words is "fifty million, eight hundred twenty-one thousand, six hundred thirty-six".