507221 has 8 divisors (see below), whose sum is σ = 596064. Its totient is φ = 425520.

The previous prime is 507217. The next prime is 507289. The reversal of 507221 is 122705.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 507221 - 2² = 507217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 507221.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 507221.

It is not an unprimeable number, because it can be changed into a prime (507421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1631 + ... + 1916.

It is an arithmetic number, because the mean of its divisors is an integer number (74508).

2⁵⁰⁷²²¹ is an apocalyptic number.

It is an amenable number.

507221 is a deficient number, since it is larger than the sum of its proper divisors (88843).

507221 is a wasteful number, since it uses less digits than its factorization.

507221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3571.

The product of its (nonzero) digits is 140, while the sum is 17.

The square root of 507221 is about 712.1944959068. The cubic root of 507221 is about 79.7503152800.

Adding to 507221 its reverse (122705), we get a palindrome (629926).

The spelling of 507221 in words is "five hundred seven thousand, two hundred twenty-one".