500521221 has 8 divisors (see below), whose sum is σ = 741512960. Its totient is φ = 333680796.

The previous prime is 500521213. The next prime is 500521253. The reversal of 500521221 is 122125005.

It is not a de Polignac number, because 500521221 - 2³ = 500521213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 500521194 and 500521203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (500521201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9268885 + ... + 9268938.

It is an arithmetic number, because the mean of its divisors is an integer number (92689120).

Almost surely, 2^500521221 is an apocalyptic number.

It is an amenable number.

500521221 is a deficient number, since it is larger than the sum of its proper divisors (240991739).

500521221 is a wasteful number, since it uses less digits than its factorization.

500521221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18537832 (or 18537826 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 500521221 is about 22372.3315950752. The cubic root of 500521221 is about 793.9762257938.

Adding to 500521221 its reverse (122125005), we get a palindrome (622646226).

The spelling of 500521221 in words is "five hundred million, five hundred twenty-one thousand, two hundred twenty-one".