209224 has 8 divisors (see below), whose sum is σ = 392310. Its totient is φ = 104608.

The previous prime is 209221. The next prime is 209227. The reversal of 209224 is 422902.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (209221) and next prime (209227).

It can be written as a sum of positive squares in only one way, i.e., 202500 + 6724 = 450^2 + 82^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (19) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (209221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13069 + ... + 13084.

2²⁰⁹²²⁴ is an apocalyptic number.

It is an amenable number.

209224 is a deficient number, since it is larger than the sum of its proper divisors (183086).

209224 is a wasteful number, since it uses less digits than its factorization.

209224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26159 (or 26155 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 209224 is about 457.4101004569. The cubic root of 209224 is about 59.3659151382.

It can be divided in two parts, 2092 and 24, that added together give a square (2116 = 46²).

The spelling of 209224 in words is "two hundred nine thousand, two hundred twenty-four".