171997115 has 12 divisors (see below), whose sum is σ = 213764304. Its totient is φ = 132849696.

The previous prime is 171997087. The next prime is 171997123. The reversal of 171997115 is 511799171.

It is not a de Polignac number, because 171997115 - 2⁶ = 171997051 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16247 + ... + 24656.

It is an arithmetic number, because the mean of its divisors is an integer number (17813692).

Almost surely, 2^171997115 is an apocalyptic number.

171997115 is a deficient number, since it is larger than the sum of its proper divisors (41767189).

171997115 is an equidigital number, since it uses as much as digits as its factorization.

171997115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40966 (or 40937 counting only the distinct ones).

The product of its digits is 19845, while the sum is 41.

The square root of 171997115 is about 13114.7670585489. The cubic root of 171997115 is about 556.1266672657.

The spelling of 171997115 in words is "one hundred seventy-one million, nine hundred ninety-seven thousand, one hundred fifteen".