50163821 has 4 divisors (see below), whose sum is σ = 53114652. Its totient is φ = 47212992.

The previous prime is 50163809. The next prime is 50163829. The reversal of 50163821 is 12836105.

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 29278921 + 20884900 = 5411^2 + 4570^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50163821 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 (50163829) 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, 1475390 + ... + 1475423.

It is an arithmetic number, because the mean of its divisors is an integer number (13278663).

Almost surely, 2^50163821 is an apocalyptic number.

It is an amenable number.

50163821 is a deficient number, since it is larger than the sum of its proper divisors (2950831).

50163821 is a wasteful number, since it uses less digits than its factorization.

50163821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2950830.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 50163821 is about 7082.6422329523. The cubic root of 50163821 is about 368.8050590581.

Adding to 50163821 its reverse (12836105), we get a palindrome (62999926).

The spelling of 50163821 in words is "fifty million, one hundred sixty-three thousand, eight hundred twenty-one".