5221224 has 48 divisors (see below), whose sum is σ = 14277120. Its totient is φ = 1723680.

The previous prime is 5221217. The next prime is 5221231. The reversal of 5221224 is 4221225.

It is a Cunningham number, because it is equal to 2285²-1.

It is an interprime number because it is at equal distance from previous prime (5221217) and next prime (5221231).

It is a super-2 number, since 2×5221224² = 54522360116352, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 5221197 and 5221206.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8859 + ... + 9429.

It is an arithmetic number, because the mean of its divisors is an integer number (297440).

Almost surely, 2^5221224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5221224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7138560).

5221224 is an abundant number, since it is smaller than the sum of its proper divisors (9055896).

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

5221224 is a wasteful number, since it uses less digits than its factorization.

5221224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710 (or 703 counting only the distinct ones).

The product of its digits is 320, while the sum is 18.

The square root of 5221224 is about 2284.9997811816. Note that the first 3 decimals coincide. The cubic root of 5221224 is about 173.4832069942.

Adding to 5221224 its reverse (4221225), we get a palindrome (9442449).

Subtracting from 5221224 its reverse (4221225), we obtain a palindrome (999999).

It can be divided in two parts, 5221 and 224, that added together give a palindrome (5445).

The spelling of 5221224 in words is "five million, two hundred twenty-one thousand, two hundred twenty-four".