171245555831 has 16 divisors (see below), whose sum is σ = 196487864640. Its totient is φ = 146198304000.

The previous prime is 171245555821. The next prime is 171245555839. The reversal of 171245555831 is 138555542171.

It is not a de Polignac number, because 171245555831 - 2¹⁰ = 171245554807 is a prime.

It is a super-2 number, since 2×171245555831² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171245555839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5804225 + ... + 5833653.

It is an arithmetic number, because the mean of its divisors is an integer number (12280491540).

Almost surely, 2^171245555831 is an apocalyptic number.

171245555831 is a deficient number, since it is larger than the sum of its proper divisors (25242308809).

171245555831 is a wasteful number, since it uses less digits than its factorization.

171245555831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32714.

The product of its digits is 840000, while the sum is 47.

The spelling of 171245555831 in words is "one hundred seventy-one billion, two hundred forty-five million, five hundred fifty-five thousand, eight hundred thirty-one".