165261359 has 2 divisors, whose sum is σ = 165261360.
Its totient is φ = 165261358.
The previous prime is 165261311. The next prime is 165261361. The reversal of 165261359 is 953162561.
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 165261359 - 212 = 165257263 is a prime.
It is a super-2 number, since 2×1652613592 = 54622633557053762, which contains 22 as substring.
Together with 165261361, it forms a pair of twin primes.
It is a Chen prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (165261389) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82630679 + 82630680.
It is an arithmetic number, because the mean of its divisors is an integer number (82630680).
Almost surely, 2165261359 is an apocalyptic number.
165261359 is a deficient number, since it is larger than the sum of its proper divisors (1).
165261359 is an equidigital number, since it uses as much as digits as its factorization.
165261359 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 48600, while the sum is 38.
The square root of 165261359 is about 12855.4019384848.
The cubic root of 165261359 is about 548.7700991491.
The spelling of 165261359 in words is "one hundred sixty-five million, two hundred sixty-one thousand, three hundred fifty-nine".