43221248 has 72 divisors (see below), whose sum is σ = 100074240. Its totient is φ = 18247680.

The previous prime is 43221239. The next prime is 43221263. The reversal of 43221248 is 84212234.

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 7 ways as a sum of consecutive naturals, for example, 159353 + ... + 159623.

It is an arithmetic number, because the mean of its divisors is an integer number (1389920).

Almost surely, 2^43221248 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 43221248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50037120).

43221248 is an abundant number, since it is smaller than the sum of its proper divisors (56852992).

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

43221248 is an equidigital number, since it uses as much as digits as its factorization.

43221248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383 (or 369 counting only the distinct ones).

The product of its digits is 3072, while the sum is 26.

The square root of 43221248 is about 6574.2868814800. The cubic root of 43221248 is about 350.9396464981.

The spelling of 43221248 in words is "forty-three million, two hundred twenty-one thousand, two hundred forty-eight".