7221248 has 52 divisors (see below), whose sum is σ = 15136968. Its totient is φ = 3440640.

The previous prime is 7221199. The next prime is 7221251. The reversal of 7221248 is 8421227.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167915 + ... + 167957.

Almost surely, 2^7221248 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7221248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7568484).

7221248 is an abundant number, since it is smaller than the sum of its proper divisors (7915720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7221248 is an equidigital number, since it uses as much as digits as its factorization.

7221248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108 (or 86 counting only the distinct ones).

The product of its digits is 1792, while the sum is 26.

The square root of 7221248 is about 2687.2379872278. The cubic root of 7221248 is about 193.2876414680.

The spelling of 7221248 in words is "seven million, two hundred twenty-one thousand, two hundred forty-eight".