224381 has 4 divisors (see below), whose sum is σ = 225852. Its totient is φ = 222912.

The previous prime is 224363. The next prime is 224401. The reversal of 224381 is 183422.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 183422 = 2 ⋅91711.

It can be written as a sum of positive squares in 2 ways, for example, as 217156 + 7225 = 466^2 + 85^2 .

It is a cyclic number.

It is not a de Polignac number, because 224381 - 2⁶ = 224317 is a prime.

It is a super-2 number, since 2×224381² = 100693666322, 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 (224351) 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, 476 + ... + 821.

It is an arithmetic number, because the mean of its divisors is an integer number (56463).

2²²⁴³⁸¹ is an apocalyptic number.

It is an amenable number.

224381 is a deficient number, since it is larger than the sum of its proper divisors (1471).

224381 is a wasteful number, since it uses less digits than its factorization.

224381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1470.

The product of its digits is 384, while the sum is 20.

The square root of 224381 is about 473.6887163528. The cubic root of 224381 is about 60.7661926837.

The spelling of 224381 in words is "two hundred twenty-four thousand, three hundred eighty-one".