226666221 has 8 divisors (see below), whose sum is σ = 302347584. Its totient is φ = 151047840.

The previous prime is 226666207. The next prime is 226666243. The reversal of 226666221 is 122666622.

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

It is not a de Polignac number, because 226666221 - 2⁵ = 226666189 is a prime.

It is a super-3 number, since 3×226666221³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (226662221) 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, 6585 + ... + 22286.

It is an arithmetic number, because the mean of its divisors is an integer number (37793448).

Almost surely, 2^226666221 is an apocalyptic number.

It is an amenable number.

226666221 is a deficient number, since it is larger than the sum of its proper divisors (75681363).

226666221 is a wasteful number, since it uses less digits than its factorization.

226666221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31491.

The product of its digits is 20736, while the sum is 33.

The square root of 226666221 is about 15055.4382533356. The cubic root of 226666221 is about 609.7178853132.

The spelling of 226666221 in words is "two hundred twenty-six million, six hundred sixty-six thousand, two hundred twenty-one".