224345521 has 4 divisors (see below), whose sum is σ = 236153200. Its totient is φ = 212537844.

The previous prime is 224345507. The next prime is 224345531. The reversal of 224345521 is 125543422.

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 224345521 - 2⁵ = 224345489 is a prime.

It is a super-2 number, since 2×224345521² = 100661825585522882, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 224345521.

It is not an unprimeable number, because it can be changed into a prime (224345501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5903811 + ... + 5903848.

It is an arithmetic number, because the mean of its divisors is an integer number (59038300).

Almost surely, 2^224345521 is an apocalyptic number.

It is an amenable number.

224345521 is a deficient number, since it is larger than the sum of its proper divisors (11807679).

224345521 is a wasteful number, since it uses less digits than its factorization.

224345521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11807678.

The product of its digits is 9600, while the sum is 28.

The square root of 224345521 is about 14978.1681456712. The cubic root of 224345521 is about 607.6298974263.

Adding to 224345521 its reverse (125543422), we get a palindrome (349888943).

The spelling of 224345521 in words is "two hundred twenty-four million, three hundred forty-five thousand, five hundred twenty-one".