171311081 has 4 divisors (see below), whose sum is σ = 171556164. Its totient is φ = 171066000.

The previous prime is 171311069. The next prime is 171311089. The reversal of 171311081 is 180113171.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 127486681 + 43824400 = 11291^2 + 6620^2 .

It is a cyclic number.

It is not a de Polignac number, because 171311081 - 2⁶ = 171311017 is a prime.

It is a super-3 number, since 3×171311081³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (171311089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121490 + ... + 122891.

It is an arithmetic number, because the mean of its divisors is an integer number (42889041).

Almost surely, 2^171311081 is an apocalyptic number.

It is an amenable number.

171311081 is a deficient number, since it is larger than the sum of its proper divisors (245083).

171311081 is an equidigital number, since it uses as much as digits as its factorization.

171311081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245082.

The product of its (nonzero) digits is 168, while the sum is 23.

The square root of 171311081 is about 13088.5859052840. The cubic root of 171311081 is about 555.3862862819.

The spelling of 171311081 in words is "one hundred seventy-one million, three hundred eleven thousand, eighty-one".