224163809 has 4 divisors (see below), whose sum is σ = 224558340. Its totient is φ = 223769280.

The previous prime is 224163803. The next prime is 224163811. The reversal of 224163809 is 908361422.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 908361422 = 2 ⋅454180711.

It can be written as a sum of positive squares in 2 ways, for example, as 36336784 + 187827025 = 6028^2 + 13705^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-224163809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (224163803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196412 + ... + 197549.

It is an arithmetic number, because the mean of its divisors is an integer number (56139585).

Almost surely, 2^224163809 is an apocalyptic number.

It is an amenable number.

224163809 is a deficient number, since it is larger than the sum of its proper divisors (394531).

224163809 is an equidigital number, since it uses as much as digits as its factorization.

224163809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394530.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 224163809 is about 14972.1010215667. The cubic root of 224163809 is about 607.4658001487.

The spelling of 224163809 in words is "two hundred twenty-four million, one hundred sixty-three thousand, eight hundred nine".