226221 has 4 divisors (see below), whose sum is σ = 301632. Its totient is φ = 150812.

The previous prime is 226217. The next prime is 226231. The reversal of 226221 is 122622.

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 226221 - 2² = 226217 is a prime.

It is a D-number.

It is a Curzon number.

226221 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 226221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (226201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37701 + ... + 37706.

It is an arithmetic number, because the mean of its divisors is an integer number (75408).

2²²⁶²²¹ is an apocalyptic number.

It is an amenable number.

226221 is a deficient number, since it is larger than the sum of its proper divisors (75411).

226221 is an equidigital number, since it uses as much as digits as its factorization.

226221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75410.

The product of its digits is 96, while the sum is 15.

The square root of 226221 is about 475.6269546609. The cubic root of 226221 is about 60.9318418152.

Adding to 226221 its reverse (122622), we get a palindrome (348843).

The spelling of 226221 in words is "two hundred twenty-six thousand, two hundred twenty-one".