224557 has 4 divisors (see below), whose sum is σ = 230076. Its totient is φ = 219040.

The previous prime is 224527. The next prime is 224563. The reversal of 224557 is 755422.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 755422 = 2 ⋅377711.

It can be written as a sum of positive squares in 2 ways, for example, as 133956 + 90601 = 366^2 + 301^2 .

It is a cyclic number.

It is not a de Polignac number, because 224557 - 2⁷ = 224429 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2698 + ... + 2779.

It is an arithmetic number, because the mean of its divisors is an integer number (57519).

2²²⁴⁵⁵⁷ is an apocalyptic number.

It is an amenable number.

224557 is a deficient number, since it is larger than the sum of its proper divisors (5519).

224557 is an equidigital number, since it uses as much as digits as its factorization.

224557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5518.

The product of its digits is 2800, while the sum is 25.

The square root of 224557 is about 473.8744559480. The cubic root of 224557 is about 60.7820764631.

Adding to 224557 its reverse (755422), we get a palindrome (979979).

The spelling of 224557 in words is "two hundred twenty-four thousand, five hundred fifty-seven".