220890221 has 8 divisors (see below), whose sum is σ = 228480000. Its totient is φ = 213329520.

The previous prime is 220890217. The next prime is 220890233. The reversal of 220890221 is 122098022.

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 220890221 - 2² = 220890217 is a prime.

It is a super-3 number, since 3×220890221³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220890421) 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, 8780 + ... + 22778.

It is an arithmetic number, because the mean of its divisors is an integer number (28560000).

Almost surely, 2^220890221 is an apocalyptic number.

It is an amenable number.

220890221 is a deficient number, since it is larger than the sum of its proper divisors (7589779).

220890221 is a wasteful number, since it uses less digits than its factorization.

220890221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14539.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 220890221 is about 14862.3760213500. The cubic root of 220890221 is about 604.4942347792.

It can be divided in two parts, 2208 and 90221, that added together give a palindrome (92429).

The spelling of 220890221 in words is "two hundred twenty million, eight hundred ninety thousand, two hundred twenty-one".