212229 has 6 divisors (see below), whose sum is σ = 306566. Its totient is φ = 141480.

The previous prime is 212227. The next prime is 212239. The reversal of 212229 is 922212.

212229 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 161604 + 50625 = 402^2 + 225^2 .

It is not a de Polignac number, because 212229 - 2¹ = 212227 is a prime.

It is a super-2 number, since 2×212229² = 90082296882, which contains 22 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 (212227) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11782 + ... + 11799.

2²¹²²²⁹ is an apocalyptic number.

It is an amenable number.

212229 is a deficient number, since it is larger than the sum of its proper divisors (94337).

212229 is a wasteful number, since it uses less digits than its factorization.

212229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23587 (or 23584 counting only the distinct ones).

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

The square root of 212229 is about 460.6831883193. The cubic root of 212229 is about 59.6487814369.

It can be divided in two parts, 212 and 229, that added together give a square (441 = 21²).

The spelling of 212229 in words is "two hundred twelve thousand, two hundred twenty-nine".