171161143831 has 4 divisors (see below), whose sum is σ = 175141635592. Its totient is φ = 167180652072.

The previous prime is 171161143823. The next prime is 171161143847. The reversal of 171161143831 is 138341161171.

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 171161143831 - 2³ = 171161143823 is a prime.

It is a super-2 number, since 2×171161143831² (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 (171161143801) 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, 1990245816 + ... + 1990245901.

It is an arithmetic number, because the mean of its divisors is an integer number (43785408898).

Almost surely, 2^171161143831 is an apocalyptic number.

171161143831 is a deficient number, since it is larger than the sum of its proper divisors (3980491761).

171161143831 is an equidigital number, since it uses as much as digits as its factorization.

171161143831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3980491760.

The product of its digits is 12096, while the sum is 37.

The spelling of 171161143831 in words is "one hundred seventy-one billion, one hundred sixty-one million, one hundred forty-three thousand, eight hundred thirty-one".