224815 has 4 divisors (see below), whose sum is σ = 269784. Its totient is φ = 179848.

The previous prime is 224813. The next prime is 224831. The reversal of 224815 is 518422.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 518422 = 2 ⋅259211.

It is a cyclic number.

It is not a de Polignac number, because 224815 - 2¹ = 224813 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224813) 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, 22477 + ... + 22486.

It is an arithmetic number, because the mean of its divisors is an integer number (67446).

2²²⁴⁸¹⁵ is an apocalyptic number.

224815 is a deficient number, since it is larger than the sum of its proper divisors (44969).

224815 is an equidigital number, since it uses as much as digits as its factorization.

224815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44968.

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

The square root of 224815 is about 474.1466018016. The cubic root of 224815 is about 60.8053456461.

The spelling of 224815 in words is "two hundred twenty-four thousand, eight hundred fifteen".