220718216 has 8 divisors (see below), whose sum is σ = 413846670. Its totient is φ = 110359104.

The previous prime is 220718213. The next prime is 220718219. The reversal of 220718216 is 612817022.

It is an interprime number because it is at equal distance from previous prime (220718213) and next prime (220718219).

It can be written as a sum of positive squares in only one way, i.e., 142324900 + 78393316 = 11930^2 + 8854^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (220718213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13794881 + ... + 13794896.

Almost surely, 2^220718216 is an apocalyptic number.

It is an amenable number.

220718216 is a deficient number, since it is larger than the sum of its proper divisors (193128454).

220718216 is a wasteful number, since it uses less digits than its factorization.

220718216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27589783 (or 27589779 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 220718216 is about 14856.5883028372. The cubic root of 220718216 is about 604.3372895020.

The spelling of 220718216 in words is "two hundred twenty million, seven hundred eighteen thousand, two hundred sixteen".