216220448 has 12 divisors (see below), whose sum is σ = 425684070. Its totient is φ = 108110208.

The previous prime is 216220439. The next prime is 216220463. The reversal of 216220448 is 844022612.

It can be written as a sum of positive squares in only one way, i.e., 134281744 + 81938704 = 11588^2 + 9052^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 216220448.

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 as a sum of consecutive naturals, namely, 3378413 + ... + 3378476.

Almost surely, 2^216220448 is an apocalyptic number.

It is an amenable number.

216220448 is a deficient number, since it is larger than the sum of its proper divisors (209463622).

216220448 is an equidigital number, since it uses as much as digits as its factorization.

216220448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6756899 (or 6756891 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 216220448 is about 14704.4363373779. The cubic root of 216220448 is about 600.2040491172.

The spelling of 216220448 in words is "two hundred sixteen million, two hundred twenty thousand, four hundred forty-eight".