171117320 has 32 divisors (see below), whose sum is σ = 420016320. Its totient is φ = 62224320.

The previous prime is 171117311. The next prime is 171117343. The reversal of 171117320 is 23711171.

It is a super-2 number, since 2×171117320² = 58562274407964800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194012 + ... + 194891.

It is an arithmetic number, because the mean of its divisors is an integer number (13125510).

Almost surely, 2^171117320 is an apocalyptic number.

171117320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

171117320 is an abundant number, since it is smaller than the sum of its proper divisors (248899000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

171117320 is a wasteful number, since it uses less digits than its factorization.

171117320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388925 (or 388921 counting only the distinct ones).

The product of its (nonzero) digits is 294, while the sum is 23.

The square root of 171117320 is about 13081.1819037884. The cubic root of 171117320 is about 555.1768178330.

Adding to 171117320 its reverse (23711171), we get a palindrome (194828491).

The spelling of 171117320 in words is "one hundred seventy-one million, one hundred seventeen thousand, three hundred twenty".