504320221 has 4 divisors (see below), whose sum is σ = 504469152. Its totient is φ = 504171292.

The previous prime is 504320203. The next prime is 504320227. The reversal of 504320221 is 122023405.

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.

It is a cyclic number.

It is not a de Polignac number, because 504320221 - 2¹¹ = 504318173 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 (504320227) 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, 69265 + ... + 76198.

It is an arithmetic number, because the mean of its divisors is an integer number (126117288).

Almost surely, 2^504320221 is an apocalyptic number.

It is an amenable number.

504320221 is a deficient number, since it is larger than the sum of its proper divisors (148931).

504320221 is a wasteful number, since it uses less digits than its factorization.

504320221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148930.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 504320221 is about 22457.0750766880. The cubic root of 504320221 is about 795.9799479179.

Adding to 504320221 its reverse (122023405), we get a palindrome (626343626).

The spelling of 504320221 in words is "five hundred four million, three hundred twenty thousand, two hundred twenty-one".