221220223 has 8 divisors (see below), whose sum is σ = 253081760. Its totient is φ = 189423360.

The previous prime is 221220163. The next prime is 221220229. The reversal of 221220223 is 322022122.

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

It is not a de Polignac number, because 221220223 - 2¹³ = 221212031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221220197 and 221220206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221220229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8598 + ... + 22723.

It is an arithmetic number, because the mean of its divisors is an integer number (31635220).

Almost surely, 2^221220223 is an apocalyptic number.

221220223 is a deficient number, since it is larger than the sum of its proper divisors (31861537).

221220223 is a wasteful number, since it uses less digits than its factorization.

221220223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32337.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 221220223 is about 14873.4738040580. The cubic root of 221220223 is about 604.7951158340.

Adding to 221220223 its reverse (322022122), we get a palindrome (543242345).

The spelling of 221220223 in words is "two hundred twenty-one million, two hundred twenty thousand, two hundred twenty-three".