165211 has 2 divisors, whose sum is σ = 165212.
Its totient is φ = 165210.
The previous prime is 165203. The next prime is 165229. The reversal of 165211 is 112561.
It is a happy number.
165211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 165211 - 23 = 165203 is a prime.
It is equal to p15109 and since 165211 and 15109 have the same sum of digits, it is a Honaker prime.
It is not a weakly prime, because it can be changed into another prime (165311) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82605 + 82606.
It is an arithmetic number, because the mean of its divisors is an integer number (82606).
2165211 is an apocalyptic number.
165211 is a deficient number, since it is larger than the sum of its proper divisors (1).
165211 is an equidigital number, since it uses as much as digits as its factorization.
165211 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 60, while the sum is 16.
The square root of 165211 is about 406.4615602981.
The cubic root of 165211 is about 54.8714352460.
Adding to 165211 its reverse (112561), we get a palindrome (277772).
Subtracting from 165211 its reverse (112561), we obtain a triangular number (52650 = T324).
The spelling of 165211 in words is "one hundred sixty-five thousand, two hundred eleven".