500231221 has 16 divisors (see below), whose sum is σ = 621199360. Its totient is φ = 393096240.

The previous prime is 500231197. The next prime is 500231227. The reversal of 500231221 is 122132005.

It is a cyclic number.

It is not a de Polignac number, because 500231221 - 2⁷ = 500231093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 500231195 and 500231204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (500231227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56541 + ... + 64786.

It is an arithmetic number, because the mean of its divisors is an integer number (38824960).

Almost surely, 2^500231221 is an apocalyptic number.

It is an amenable number.

500231221 is a deficient number, since it is larger than the sum of its proper divisors (120968139).

500231221 is a wasteful number, since it uses less digits than its factorization.

500231221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121384.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 500231221 is about 22365.8494361381. The cubic root of 500231221 is about 793.8228539491.

Adding to 500231221 its reverse (122132005), we get a palindrome (622363226).

The spelling of 500231221 in words is "five hundred million, two hundred thirty-one thousand, two hundred twenty-one".