224105521 has 4 divisors (see below), whose sum is σ = 227779444. Its totient is φ = 220431600.

The previous prime is 224105507. The next prime is 224105569. The reversal of 224105521 is 125501422.

224105521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 94965025 + 129140496 = 9745^2 + 11364^2 .

It is a cyclic number.

It is not a de Polignac number, because 224105521 - 2⁵ = 224105489 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 224105492 and 224105501.

It is not an unprimeable number, because it can be changed into a prime (224102521) 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, 1836870 + ... + 1836991.

It is an arithmetic number, because the mean of its divisors is an integer number (56944861).

Almost surely, 2^224105521 is an apocalyptic number.

It is an amenable number.

224105521 is a deficient number, since it is larger than the sum of its proper divisors (3673923).

224105521 is an equidigital number, since it uses as much as digits as its factorization.

224105521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3673922.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 224105521 is about 14970.1543412217. The cubic root of 224105521 is about 607.4131436619.

Adding to 224105521 its reverse (125501422), we get a palindrome (349606943).

The spelling of 224105521 in words is "two hundred twenty-four million, one hundred five thousand, five hundred twenty-one".