131239915171 has 8 divisors (see below), whose sum is σ = 134120465600. Its totient is φ = 128389847040.

The previous prime is 131239915129. The next prime is 131239915189. The reversal of 131239915171 is 171519932131.

It is a happy number.

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

It is a 11-Lehmer number, since φ(131239915171) divides (131239915171-1)¹¹.

It is a cyclic number.

It is not a de Polignac number, because 131239915171 - 2¹⁹ = 131239390883 is a prime.

It is the 362271-st Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131239915111) by changing a digit.

It is a nontrivial repunit in base 362270.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7611870 + ... + 7629091.

It is an arithmetic number, because the mean of its divisors is an integer number (16765058200).

Almost surely, 2^131239915171 is an apocalyptic number.

131239915171 is a deficient number, since it is larger than the sum of its proper divisors (2880550429).

131239915171 is a wasteful number, since it uses less digits than its factorization.

131239915171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15241149.

The product of its digits is 51030, while the sum is 43.

The spelling of 131239915171 in words is "one hundred thirty-one billion, two hundred thirty-nine million, nine hundred fifteen thousand, one hundred seventy-one".