220316221 has 4 divisors (see below), whose sum is σ = 220651200. Its totient is φ = 219981244.

The previous prime is 220316203. The next prime is 220316237. The reversal of 220316221 is 122613022.

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 220316221 - 2⁵ = 220316189 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 (220316281) 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 3 ways as a sum of consecutive naturals, for example, 166501 + ... + 167818.

It is an arithmetic number, because the mean of its divisors is an integer number (55162800).

Almost surely, 2^220316221 is an apocalyptic number.

It is an amenable number.

220316221 is a deficient number, since it is larger than the sum of its proper divisors (334979).

220316221 is an equidigital number, since it uses as much as digits as its factorization.

220316221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334978.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 220316221 is about 14843.0529541601. The cubic root of 220316221 is about 603.9701725326.

Adding to 220316221 its reverse (122613022), we get a palindrome (342929243).

The spelling of 220316221 in words is "two hundred twenty million, three hundred sixteen thousand, two hundred twenty-one".