172057171 has 16 divisors (see below), whose sum is σ = 202577760. Its totient is φ = 144069120.

The previous prime is 172057169. The next prime is 172057189. The reversal of 172057171 is 171750271.

It is not a de Polignac number, because 172057171 - 2¹ = 172057169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172057121) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 83785 + ... + 85813.

It is an arithmetic number, because the mean of its divisors is an integer number (12661110).

Almost surely, 2^172057171 is an apocalyptic number.

172057171 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

172057171 is a deficient number, since it is larger than the sum of its proper divisors (30520589).

172057171 is a wasteful number, since it uses less digits than its factorization.

172057171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2646.

The product of its (nonzero) digits is 3430, while the sum is 31.

The square root of 172057171 is about 13117.0564914542. The cubic root of 172057171 is about 556.1913870657.

The spelling of 172057171 in words is "one hundred seventy-two million, fifty-seven thousand, one hundred seventy-one".