171320856 has 48 divisors (see below), whose sum is σ = 498232440. Its totient is φ = 48948480.

The previous prime is 171320819. The next prime is 171320861. The reversal of 171320856 is 658023171.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71665 + ... + 74016.

Almost surely, 2^171320856 is an apocalyptic number.

It is an amenable number.

171320856 is an abundant number, since it is smaller than the sum of its proper divisors (326911584).

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

171320856 is a wasteful number, since it uses less digits than its factorization.

171320856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145704 (or 145693 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 171320856 is about 13088.9593169205. The cubic root of 171320856 is about 555.3968495170.

The spelling of 171320856 in words is "one hundred seventy-one million, three hundred twenty thousand, eight hundred fifty-six".