505303221 has 8 divisors (see below), whose sum is σ = 696970080. Its totient is φ = 325252592.

The previous prime is 505303187. The next prime is 505303231. The reversal of 505303221 is 122303505.

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 505303221 - 2⁷ = 505303093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505303231) 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, 2903955 + ... + 2904128.

It is an arithmetic number, because the mean of its divisors is an integer number (87121260).

Almost surely, 2^505303221 is an apocalyptic number.

It is an amenable number.

505303221 is a deficient number, since it is larger than the sum of its proper divisors (191666859).

505303221 is a wasteful number, since it uses less digits than its factorization.

505303221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5808115.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 505303221 is about 22478.9506205250. The cubic root of 505303221 is about 796.4967759398.

Adding to 505303221 its reverse (122303505), we get a palindrome (627606726).

The spelling of 505303221 in words is "five hundred five million, three hundred three thousand, two hundred twenty-one".