1224223225 has 6 divisors (see below), whose sum is σ = 1518036830. Its totient is φ = 979378560.

The previous prime is 1224223211. The next prime is 1224223229. The reversal of 1224223225 is 5223224221.

It can be written as a sum of positive squares in 3 ways, for example, as 2301289 + 1221921936 = 1517^2 + 34956^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1224223225 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: 48968929 = 1224223225 / (1 + 2 + 2 + 4 + 2 + 2 + 3 + 2 + 2 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 1224223225.

It is not an unprimeable number, because it can be changed into a prime (1224223229) 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, 24484440 + ... + 24484489.

Almost surely, 2^1224223225 is an apocalyptic number.

It is an amenable number.

1224223225 is a deficient number, since it is larger than the sum of its proper divisors (293813605).

1224223225 is an equidigital number, since it uses as much as digits as its factorization.

1224223225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48968939 (or 48968934 counting only the distinct ones).

The product of its digits is 3840, while the sum is 25.

The square root of 1224223225 is about 34988.9014546041. The cubic root of 1224223225 is about 1069.7612723303.

Adding to 1224223225 its reverse (5223224221), we get a palindrome (6447447446).

The spelling of 1224223225 in words is "one billion, two hundred twenty-four million, two hundred twenty-three thousand, two hundred twenty-five".