225447 has 4 divisors (see below), whose sum is σ = 300600. Its totient is φ = 150296.

The previous prime is 225431. The next prime is 225457. The reversal of 225447 is 744522.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 225447 - 2⁴ = 225431 is a prime.

It is a D-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 225447.

It is not an unprimeable number, because it can be changed into a prime (225427) 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, 37572 + ... + 37577.

It is an arithmetic number, because the mean of its divisors is an integer number (75150).

2²²⁵⁴⁴⁷ is an apocalyptic number.

225447 is a deficient number, since it is larger than the sum of its proper divisors (75153).

225447 is an equidigital number, since it uses as much as digits as its factorization.

225447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75152.

The product of its digits is 2240, while the sum is 24.

The square root of 225447 is about 474.8125946097. The cubic root of 225447 is about 60.8622710056.

Adding to 225447 its reverse (744522), we get a palindrome (969969).

The spelling of 225447 in words is "two hundred twenty-five thousand, four hundred forty-seven".