5218225 has 6 divisors (see below), whose sum is σ = 6470630. Its totient is φ = 4174560.

The previous prime is 5218211. The next prime is 5218229. The reversal of 5218225 is 5228125.

It can be written as a sum of positive squares in 3 ways, for example, as 685584 + 4532641 = 828^2 + 2129^2 .

It is not a de Polignac number, because 5218225 - 2¹³ = 5210033 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 208729 = 5218225 / (5 + 2 + 1 + 8 + 2 + 2 + 5).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 5218225.

It is not an unprimeable number, because it can be changed into a prime (5218229) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 104340 + ... + 104389.

Almost surely, 2^5218225 is an apocalyptic number.

It is an amenable number.

5218225 is a deficient number, since it is larger than the sum of its proper divisors (1252405).

5218225 is a wasteful number, since it uses less digits than its factorization.

5218225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208739 (or 208734 counting only the distinct ones).

The product of its digits is 1600, while the sum is 25.

The square root of 5218225 is about 2284.3434505345. The cubic root of 5218225 is about 173.4499851684.

The spelling of 5218225 in words is "five million, two hundred eighteen thousand, two hundred twenty-five".