171172112247 has 32 divisors (see below), whose sum is σ = 262451636160. Its totient is φ = 110183639040.

The previous prime is 171172112161. The next prime is 171172112249. The reversal of 171172112247 is 742211271171.

It is not a de Polignac number, because 171172112247 - 2⁸ = 171172111991 is a prime.

It is a super-2 number, since 2×171172112247² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171172112249) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 689668 + ... + 904425.

It is an arithmetic number, because the mean of its divisors is an integer number (8201613630).

Almost surely, 2^171172112247 is an apocalyptic number.

171172112247 is a deficient number, since it is larger than the sum of its proper divisors (91279523913).

171172112247 is a wasteful number, since it uses less digits than its factorization.

171172112247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1594240 (or 1594234 counting only the distinct ones).

The product of its digits is 10976, while the sum is 36.

The spelling of 171172112247 in words is "one hundred seventy-one billion, one hundred seventy-two million, one hundred twelve thousand, two hundred forty-seven".