224661 has 4 divisors (see below), whose sum is σ = 299552. Its totient is φ = 149772.

The previous prime is 224633. The next prime is 224669. The reversal of 224661 is 166422.

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 not a de Polignac number, because 224661 - 2⁵ = 224629 is a prime.

It is a D-number.

It is a Duffinian number.

224661 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 224661.

It is not an unprimeable number, because it can be changed into a prime (224669) 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, 37441 + ... + 37446.

It is an arithmetic number, because the mean of its divisors is an integer number (74888).

2²²⁴⁶⁶¹ is an apocalyptic number.

It is an amenable number.

224661 is a deficient number, since it is larger than the sum of its proper divisors (74891).

224661 is an equidigital number, since it uses as much as digits as its factorization.

224661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74890.

The product of its digits is 576, while the sum is 21.

The square root of 224661 is about 473.9841769511. The cubic root of 224661 is about 60.7914584319.

The spelling of 224661 in words is "two hundred twenty-four thousand, six hundred sixty-one".