220650217 has 2 divisors, whose sum is σ = 220650218. Its totient is φ = 220650216.

The previous prime is 220650169. The next prime is 220650223. The reversal of 220650217 is 712056022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141991056 + 78659161 = 11916^2 + 8869^2 .

It is a cyclic number.

It is not a de Polignac number, because 220650217 - 2¹⁹ = 220125929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220650191 and 220650200.

It is not a weakly prime, because it can be changed into another prime (220650317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110325108 + 110325109.

It is an arithmetic number, because the mean of its divisors is an integer number (110325109).

Almost surely, 2^220650217 is an apocalyptic number.

It is an amenable number.

220650217 is a deficient number, since it is larger than the sum of its proper divisors (1).

220650217 is an equidigital number, since it uses as much as digits as its factorization.

220650217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 220650217 is about 14854.2996132433. The cubic root of 220650217 is about 604.2752215964.

The spelling of 220650217 in words is "two hundred twenty million, six hundred fifty thousand, two hundred seventeen".