172171311 has 8 divisors (see below), whose sum is σ = 247220400. Its totient is φ = 105951552.

The previous prime is 172171309. The next prime is 172171313. The reversal of 172171311 is 113171271.

It is an interprime number because it is at equal distance from previous prime (172171309) and next prime (172171313).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 172171311 - 2¹ = 172171309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172171313) 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 7 ways as a sum of consecutive naturals, for example, 2207286 + ... + 2207363.

It is an arithmetic number, because the mean of its divisors is an integer number (30902550).

Almost surely, 2^172171311 is an apocalyptic number.

172171311 is a deficient number, since it is larger than the sum of its proper divisors (75049089).

172171311 is a wasteful number, since it uses less digits than its factorization.

172171311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4414665.

The product of its digits is 294, while the sum is 24.

The square root of 172171311 is about 13121.4065938069. The cubic root of 172171311 is about 556.3143493960.

It can be divided in two parts, 17217 and 1311, that added together give a triangular number (18528 = T₁₉₂).

The spelling of 172171311 in words is "one hundred seventy-two million, one hundred seventy-one thousand, three hundred eleven".