224291809 has 4 divisors (see below), whose sum is σ = 256333504. Its totient is φ = 192250116.

The previous prime is 224291797. The next prime is 224291831. The reversal of 224291809 is 908192422.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 224291809 - 2⁵ = 224291777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (224291869) 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, 16020837 + ... + 16020850.

It is an arithmetic number, because the mean of its divisors is an integer number (64083376).

Almost surely, 2^224291809 is an apocalyptic number.

It is an amenable number.

224291809 is a deficient number, since it is larger than the sum of its proper divisors (32041695).

224291809 is an equidigital number, since it uses as much as digits as its factorization.

224291809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32041694.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 224291809 is about 14976.3750286910. The cubic root of 224291809 is about 607.5814013656.

The spelling of 224291809 in words is "two hundred twenty-four million, two hundred ninety-one thousand, eight hundred nine".