224665521 has 8 divisors (see below), whose sum is σ = 299990304. Its totient is φ = 149558880.

The previous prime is 224665477. The next prime is 224665543. The reversal of 224665521 is 125566422.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 224665521 - 2¹¹ = 224663473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (224665321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52116 + ... + 56261.

It is an arithmetic number, because the mean of its divisors is an integer number (37498788).

Almost surely, 2^224665521 is an apocalyptic number.

It is an amenable number.

224665521 is a deficient number, since it is larger than the sum of its proper divisors (75324783).

224665521 is a wasteful number, since it uses less digits than its factorization.

224665521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109071.

The product of its digits is 28800, while the sum is 33.

The square root of 224665521 is about 14988.8465533543. The cubic root of 224665521 is about 607.9186621123.

Subtracting from 224665521 its reverse (125566422), we obtain a palindrome (99099099).

The spelling of 224665521 in words is "two hundred twenty-four million, six hundred sixty-five thousand, five hundred twenty-one".