224581 has 4 divisors (see below), whose sum is σ = 256672. Its totient is φ = 192492.

The previous prime is 224579. The next prime is 224591. The reversal of 224581 is 185422.

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 224581 - 2¹ = 224579 is a prime.

It is a super-2 number, since 2×224581² = 100873251122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224501) 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, 16035 + ... + 16048.

It is an arithmetic number, because the mean of its divisors is an integer number (64168).

2²²⁴⁵⁸¹ is an apocalyptic number.

It is an amenable number.

224581 is a deficient number, since it is larger than the sum of its proper divisors (32091).

224581 is an equidigital number, since it uses as much as digits as its factorization.

224581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32090.

The product of its digits is 640, while the sum is 22.

The square root of 224581 is about 473.8997784342. The cubic root of 224581 is about 60.7842417899.

The spelling of 224581 in words is "two hundred twenty-four thousand, five hundred eighty-one".