171206107631 has 4 divisors (see below), whose sum is σ = 184375808232. Its totient is φ = 158036407032.

The previous prime is 171206107603. The next prime is 171206107693. The reversal of 171206107631 is 136701602171.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 171206107631 - 2³⁰ = 170132365807 is a prime.

It is a super-2 number, since 2×171206107631² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 171206107591 and 171206107600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171206107531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6584850281 + ... + 6584850306.

It is an arithmetic number, because the mean of its divisors is an integer number (46093952058).

Almost surely, 2^171206107631 is an apocalyptic number.

171206107631 is a deficient number, since it is larger than the sum of its proper divisors (13169700601).

171206107631 is a wasteful number, since it uses less digits than its factorization.

171206107631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13169700600.

The product of its (nonzero) digits is 10584, while the sum is 35.

The spelling of 171206107631 in words is "one hundred seventy-one billion, two hundred six million, one hundred seven thousand, six hundred thirty-one".