224168209 has 2 divisors, whose sum is σ = 224168210. Its totient is φ = 224168208.

The previous prime is 224168177. The next prime is 224168221. The reversal of 224168209 is 902861422.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 152596609 + 71571600 = 12353^2 + 8460^2 .

It is a cyclic number.

It is not a de Polignac number, because 224168209 - 2⁵ = 224168177 is a prime.

It is not a weakly prime, because it can be changed into another prime (224168809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112084104 + 112084105.

It is an arithmetic number, because the mean of its divisors is an integer number (112084105).

Almost surely, 2^224168209 is an apocalyptic number.

It is an amenable number.

224168209 is a deficient number, since it is larger than the sum of its proper divisors (1).

224168209 is an equidigital number, since it uses as much as digits as its factorization.

224168209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 224168209 is about 14972.2479608107. The cubic root of 224168209 is about 607.4697746708.

It can be divided in two parts, 22416 and 8209, that added together give a square (30625 = 175²).

The spelling of 224168209 in words is "two hundred twenty-four million, one hundred sixty-eight thousand, two hundred nine".