220371217 has 4 divisors (see below), whose sum is σ = 240404976. Its totient is φ = 200337460.

The previous prime is 220371199. The next prime is 220371227. The reversal of 220371217 is 712173022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 220371217 - 2⁷ = 220371089 is a prime.

It is a super-2 number, since 2×220371217² = 97126946564122178, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220371191 and 220371200.

It is not an unprimeable number, because it can be changed into a prime (220371227) 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, 10016863 + ... + 10016884.

It is an arithmetic number, because the mean of its divisors is an integer number (60101244).

Almost surely, 2^220371217 is an apocalyptic number.

It is an amenable number.

220371217 is a deficient number, since it is larger than the sum of its proper divisors (20033759).

220371217 is a wasteful number, since it uses less digits than its factorization.

220371217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20033758.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 220371217 is about 14844.9054224000. The cubic root of 220371217 is about 604.0204233040.

The spelling of 220371217 in words is "two hundred twenty million, three hundred seventy-one thousand, two hundred seventeen".