500000221 has 4 divisors (see below), whose sum is σ = 571428832. Its totient is φ = 428571612.

The previous prime is 500000201. The next prime is 500000227. The reversal of 500000221 is 122000005.

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, and also an emirpimes, since its reverse is a distinct semiprime: 122000005 = 5 ⋅24400001.

It is not a de Polignac number, because 500000221 - 2⁷ = 500000093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 500000198 and 500000207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (500000227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35714295 + ... + 35714308.

It is an arithmetic number, because the mean of its divisors is an integer number (142857208).

Almost surely, 2^500000221 is an apocalyptic number.

It is an amenable number.

500000221 is a deficient number, since it is larger than the sum of its proper divisors (71428611).

500000221 is an equidigital number, since it uses as much as digits as its factorization.

500000221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71428610.

The product of its (nonzero) digits is 20, while the sum is 10.

The square root of 500000221 is about 22360.6847167076. The cubic root of 500000221 is about 793.7006429226.

Adding to 500000221 its reverse (122000005), we get a palindrome (622000226).

The spelling of 500000221 in words is "five hundred million, two hundred twenty-one", and thus it is an aban number.