500844221 has 4 divisors (see below), whose sum is σ = 509054844. Its totient is φ = 492633600.

The previous prime is 500844193. The next prime is 500844241. The reversal of 500844221 is 122448005.

It is a happy number.

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 253128100 + 247716121 = 15910^2 + 15739^2 .

It is a cyclic number.

It is not a de Polignac number, because 500844221 - 2¹⁰ = 500843197 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 (500844241) 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, 4105220 + ... + 4105341.

It is an arithmetic number, because the mean of its divisors is an integer number (127263711).

Almost surely, 2^500844221 is an apocalyptic number.

It is an amenable number.

500844221 is a deficient number, since it is larger than the sum of its proper divisors (8210623).

500844221 is an equidigital number, since it uses as much as digits as its factorization.

500844221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8210622.

The product of its (nonzero) digits is 2560, while the sum is 26.

The square root of 500844221 is about 22379.5491688282. The cubic root of 500844221 is about 794.1469805752.

The spelling of 500844221 in words is "five hundred million, eight hundred forty-four thousand, two hundred twenty-one".