7228225 has 6 divisors (see below), whose sum is σ = 8963030. Its totient is φ = 5782560.

The previous prime is 7228223. The next prime is 7228229. The reversal of 7228225 is 5228227.

It can be written as a sum of positive squares in 3 ways, for example, as 173889 + 7054336 = 417^2 + 2656^2 .

It is not a de Polignac number, because 7228225 - 2¹ = 7228223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7228193 and 7228202.

It is not an unprimeable number, because it can be changed into a prime (7228223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 144540 + ... + 144589.

Almost surely, 2^7228225 is an apocalyptic number.

It is an amenable number.

7228225 is a deficient number, since it is larger than the sum of its proper divisors (1734805).

7228225 is a wasteful number, since it uses less digits than its factorization.

7228225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289139 (or 289134 counting only the distinct ones).

The product of its digits is 4480, while the sum is 28.

The square root of 7228225 is about 2688.5358468877. The cubic root of 7228225 is about 193.3498714218.

The spelling of 7228225 in words is "seven million, two hundred twenty-eight thousand, two hundred twenty-five".