50501821 has 4 divisors (see below), whose sum is σ = 52130944. Its totient is φ = 48872700.

The previous prime is 50501819. The next prime is 50501833. The reversal of 50501821 is 12810505.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 50501821 - 2¹ = 50501819 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 50501792 and 50501801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50501861) 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, 814515 + ... + 814576.

It is an arithmetic number, because the mean of its divisors is an integer number (13032736).

Almost surely, 2^50501821 is an apocalyptic number.

It is an amenable number.

50501821 is a deficient number, since it is larger than the sum of its proper divisors (1629123).

50501821 is a wasteful number, since it uses less digits than its factorization.

50501821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1629122.

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 50501821 is about 7106.4633257338. The cubic root of 50501821 is about 369.6315323767.

The spelling of 50501821 in words is "fifty million, five hundred one thousand, eight hundred twenty-one".