50538821 has 4 divisors (see below), whose sum is σ = 50629152. Its totient is φ = 50448492.

The previous prime is 50538799. The next prime is 50538827. The reversal of 50538821 is 12883505.

It is a happy number.

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 50538821 - 2¹⁰ = 50537797 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50538827) 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, 44321 + ... + 45446.

It is an arithmetic number, because the mean of its divisors is an integer number (12657288).

Almost surely, 2^50538821 is an apocalyptic number.

It is an amenable number.

50538821 is a deficient number, since it is larger than the sum of its proper divisors (90331).

50538821 is an equidigital number, since it uses as much as digits as its factorization.

50538821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90330.

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 50538821 is about 7109.0661130700. The cubic root of 50538821 is about 369.7217801328.

The spelling of 50538821 in words is "fifty million, five hundred thirty-eight thousand, eight hundred twenty-one".