221039648 has 48 divisors (see below), whose sum is σ = 442915200. Its totient is φ = 108573696.

The previous prime is 221039603. The next prime is 221039659. The reversal of 221039648 is 846930122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 655736 + ... + 656072.

It is an arithmetic number, because the mean of its divisors is an integer number (9227400).

Almost surely, 2^221039648 is an apocalyptic number.

It is an amenable number.

221039648 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

221039648 is a wasteful number, since it uses less digits than its factorization.

221039648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649 (or 641 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 221039648 is about 14867.4021940620. The cubic root of 221039648 is about 604.6305127292.

The spelling of 221039648 in words is "two hundred twenty-one million, thirty-nine thousand, six hundred forty-eight".