505522221 has 8 divisors (see below), whose sum is σ = 703335360. Its totient is φ = 322361952.

The previous prime is 505522219. The next prime is 505522223. The reversal of 505522221 is 122225505.

It is an interprime number because it is at equal distance from previous prime (505522219) and next prime (505522223).

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

It is not a de Polignac number, because 505522221 - 2¹ = 505522219 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 505522191 and 505522200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505522223) 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, 3663136 + ... + 3663273.

It is an arithmetic number, because the mean of its divisors is an integer number (87916920).

Almost surely, 2^505522221 is an apocalyptic number.

It is an amenable number.

505522221 is a deficient number, since it is larger than the sum of its proper divisors (197813139).

505522221 is a wasteful number, since it uses less digits than its factorization.

505522221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7326435.

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 505522221 is about 22483.8213166712. The cubic root of 505522221 is about 796.6118273867.

Adding to 505522221 its reverse (122225505), we get a palindrome (627747726).

The spelling of 505522221 in words is "five hundred five million, five hundred twenty-two thousand, two hundred twenty-one".