220169 has 2 divisors, whose sum is σ = 220170. Its totient is φ = 220168.
The previous prime is 220163. The next prime is 220177. The reversal of 220169 is 961022.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 193600 + 26569 = 440^2 + 163^2 .
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-220169 is a prime.
It is a super-2 number, since 2×2201692 = 96948777122, which contains 22 as substring.
It is a Sophie Germain prime.
It is a Curzon number.
It is a self number, because there is not a number n which added to its sum of digits gives 220169.
It is not a weakly prime, because it can be changed into another prime (220163) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110084 + 110085.
It is an arithmetic number, because the mean of its divisors is an integer number (110085).
2220169 is an apocalyptic number.
It is an amenable number.
220169 is a deficient number, since it is larger than the sum of its proper divisors (1).
220169 is an equidigital number, since it uses as much as digits as its factorization.
220169 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 216, while the sum is 20.
The square root of 220169 is about 469.2216960031. The cubic root of 220169 is about 60.3835613057.
The spelling of 220169 in words is "two hundred twenty thousand, one hundred sixty-nine".
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