220207217 has 8 divisors (see below), whose sum is σ = 223261920. Its totient is φ = 217162240.

The previous prime is 220207213. The next prime is 220207219. The reversal of 220207217 is 712702022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 220207217 - 2² = 220207213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220207192 and 220207201.

It is not an unprimeable number, because it can be changed into a prime (220207213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51134 + ... + 55272.

It is an arithmetic number, because the mean of its divisors is an integer number (27907740).

Almost surely, 2^220207217 is an apocalyptic number.

It is an amenable number.

220207217 is a deficient number, since it is larger than the sum of its proper divisors (3054703).

220207217 is an equidigital number, since it uses as much as digits as its factorization.

220207217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4863.

The product of its (nonzero) digits is 784, while the sum is 23.

The square root of 220207217 is about 14839.3806137588. The cubic root of 220207217 is about 603.8705490233.

Adding to 220207217 its reverse (712702022), we get a palindrome (932909239).

The spelling of 220207217 in words is "two hundred twenty million, two hundred seven thousand, two hundred seventeen".