229221 has 6 divisors (see below), whose sum is σ = 331110. Its totient is φ = 152808.

The previous prime is 229217. The next prime is 229223. The reversal of 229221 is 122922.

It can be written as a sum of positive squares in only one way, i.e., 216225 + 12996 = 465^2 + 114^2 .

It is not a de Polignac number, because 229221 - 2² = 229217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 229194 and 229203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (229223) 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 5 ways as a sum of consecutive naturals, for example, 12726 + ... + 12743.

It is an arithmetic number, because the mean of its divisors is an integer number (55185).

2²²⁹²²¹ is an apocalyptic number.

It is an amenable number.

229221 is a deficient number, since it is larger than the sum of its proper divisors (101889).

229221 is a wasteful number, since it uses less digits than its factorization.

229221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25475 (or 25472 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 229221 is about 478.7702998307. The cubic root of 229221 is about 61.2000064078.

The spelling of 229221 in words is "two hundred twenty-nine thousand, two hundred twenty-one".