220216871 has 4 divisors (see below), whose sum is σ = 251676432. Its totient is φ = 188757312.

The previous prime is 220216853. The next prime is 220216877. The reversal of 220216871 is 178612022.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220216871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220216877) 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 in 3 ways as a sum of consecutive naturals, for example, 15729770 + ... + 15729783.

It is an arithmetic number, because the mean of its divisors is an integer number (62919108).

Almost surely, 2^220216871 is an apocalyptic number.

220216871 is a deficient number, since it is larger than the sum of its proper divisors (31459561).

220216871 is an equidigital number, since it uses as much as digits as its factorization.

220216871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31459560.

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

The square root of 220216871 is about 14839.7058933120. The cubic root of 220216871 is about 603.8793735617.

Adding to 220216871 its reverse (178612022), we get a palindrome (398828893).

The spelling of 220216871 in words is "two hundred twenty million, two hundred sixteen thousand, eight hundred seventy-one".