224165309 has 4 divisors (see below), whose sum is σ = 231396480. Its totient is φ = 216934140.

The previous prime is 224165303. The next prime is 224165311. The reversal of 224165309 is 903561422.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-224165309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224165303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3615539 + ... + 3615600.

It is an arithmetic number, because the mean of its divisors is an integer number (57849120).

Almost surely, 2^224165309 is an apocalyptic number.

It is an amenable number.

224165309 is a deficient number, since it is larger than the sum of its proper divisors (7231171).

224165309 is an equidigital number, since it uses as much as digits as its factorization.

224165309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7231170.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 224165309 is about 14972.1511146528. The cubic root of 224165309 is about 607.4671551053.

The spelling of 224165309 in words is "two hundred twenty-four million, one hundred sixty-five thousand, three hundred nine".