220217216 has 32 divisors (see below), whose sum is σ = 440368680. Its totient is φ = 109693440.

The previous prime is 220217197. The next prime is 220217219. The reversal of 220217216 is 612712022.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 220217191 and 220217200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220217219) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 32351 + ... + 38561.

Almost surely, 2^220217216 is an apocalyptic number.

It is an amenable number.

220217216 is a deficient number, since it is larger than the sum of its proper divisors (220151464).

220217216 is an equidigital number, since it uses as much as digits as its factorization.

220217216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6502 (or 6490 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 220217216 is about 14839.7175175271. The cubic root of 220217216 is about 603.8796889149.

Adding to 220217216 its reverse (612712022), we get a palindrome (832929238).

The spelling of 220217216 in words is "two hundred twenty million, two hundred seventeen thousand, two hundred sixteen".