50821783 has 4 divisors (see below), whose sum is σ = 50841448. Its totient is φ = 50802120.

The previous prime is 50821781. The next prime is 50821787. The reversal of 50821783 is 38712805.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38712805 = 5 ⋅7742561.

It is a cyclic number.

It is not a de Polignac number, because 50821783 - 2¹ = 50821781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50821781) 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, 5241 + ... + 11362.

It is an arithmetic number, because the mean of its divisors is an integer number (12710362).

Almost surely, 2^50821783 is an apocalyptic number.

50821783 is a deficient number, since it is larger than the sum of its proper divisors (19665).

50821783 is a wasteful number, since it uses less digits than its factorization.

50821783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19664.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 50821783 is about 7128.9398230031. The cubic root of 50821783 is about 370.4105085869.

The spelling of 50821783 in words is "fifty million, eight hundred twenty-one thousand, seven hundred eighty-three".