224520 has 32 divisors (see below), whose sum is σ = 673920. Its totient is φ = 59840.

The previous prime is 224513. The next prime is 224527. The reversal of 224520 is 25422.

It is an interprime number because it is at equal distance from previous prime (224513) and next prime (224527).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a nialpdrome in base 8.

It is a self number, because there is not a number n which added to its sum of digits gives 224520.

It is not an unprimeable number, because it can be changed into a prime (224527) by changing a digit.

224520 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 816 + ... + 1055.

It is an arithmetic number, because the mean of its divisors is an integer number (21060).

2²²⁴⁵²⁰ is an apocalyptic number.

224520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

224520 is an abundant number, since it is smaller than the sum of its proper divisors (449400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

224520 is a wasteful number, since it uses less digits than its factorization.

224520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1885 (or 1881 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 224520 is about 473.8354144637. The cubic root of 224520 is about 60.7787379486.

Adding to 224520 its reverse (25422), we get a palindrome (249942).

The spelling of 224520 in words is "two hundred twenty-four thousand, five hundred twenty".