221244328 has 32 divisors (see below), whose sum is σ = 422120160. Its totient is φ = 108696640.

The previous prime is 221244311. The next prime is 221244329. The reversal of 221244328 is 823442122.

It is a junction number, because it is equal to n+sod(n) for n = 221244296 and 221244305.

It is not an unprimeable number, because it can be changed into a prime (221244329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111150 + ... + 113122.

It is an arithmetic number, because the mean of its divisors is an integer number (13191255).

Almost surely, 2^221244328 is an apocalyptic number.

It is an amenable number.

221244328 is a deficient number, since it is larger than the sum of its proper divisors (200875832).

221244328 is a wasteful number, since it uses less digits than its factorization.

221244328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2217 (or 2213 counting only the distinct ones).

The product of its digits is 6144, while the sum is 28.

The square root of 221244328 is about 14874.2841172273. The cubic root of 221244328 is about 604.8170819644.

The spelling of 221244328 in words is "two hundred twenty-one million, two hundred forty-four thousand, three hundred twenty-eight".