71225228 has 24 divisors (see below), whose sum is σ = 129153024. Its totient is φ = 34333200.

The previous prime is 71225207. The next prime is 71225267. The reversal of 71225228 is 82252217.

It is a self number, because there is not a number n which added to its sum of digits gives 71225228.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37133 + ... + 39003.

It is an arithmetic number, because the mean of its divisors is an integer number (5381376).

Almost surely, 2^71225228 is an apocalyptic number.

It is an amenable number.

71225228 is a deficient number, since it is larger than the sum of its proper divisors (57927796).

71225228 is a wasteful number, since it uses less digits than its factorization.

71225228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2213 (or 2211 counting only the distinct ones).

The product of its digits is 4480, while the sum is 29.

The square root of 71225228 is about 8439.5040138624. The cubic root of 71225228 is about 414.5191663346.

The spelling of 71225228 in words is "seventy-one million, two hundred twenty-five thousand, two hundred twenty-eight".