7225228 has 12 divisors (see below), whose sum is σ = 12672072. Its totient is φ = 3604640.

The previous prime is 7225217. The next prime is 7225241. The reversal of 7225228 is 8225227.

It is a d-powerful number, because it can be written as 7⁵ + 2⁷ + 2¹³ + 5⁹ + 2²⁰ + 2²² + 8⁴ .

It is a junction number, because it is equal to n+sod(n) for n = 7225196 and 7225205.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 351 + ... + 3817.

It is an arithmetic number, because the mean of its divisors is an integer number (1056006).

Almost surely, 2^7225228 is an apocalyptic number.

It is an amenable number.

7225228 is a deficient number, since it is larger than the sum of its proper divisors (5446844).

7225228 is a wasteful number, since it uses less digits than its factorization.

7225228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3992 (or 3990 counting only the distinct ones).

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

The square root of 7225228 is about 2687.9784225324. The cubic root of 7225228 is about 193.3231451891.

Subtracting 7225228 from its reverse (8225227), we obtain a palindrome (999999).

The spelling of 7225228 in words is "seven million, two hundred twenty-five thousand, two hundred twenty-eight".