131881375117 has 4 divisors (see below), whose sum is σ = 136135613056. Its totient is φ = 127627137180.

The previous prime is 131881375079. The next prime is 131881375127. The reversal of 131881375117 is 711573188131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131881375117 - 2²⁷ = 131747157389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131881375127) 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, 2127118923 + ... + 2127118984.

It is an arithmetic number, because the mean of its divisors is an integer number (34033903264).

Almost surely, 2^131881375117 is an apocalyptic number.

It is an amenable number.

131881375117 is a deficient number, since it is larger than the sum of its proper divisors (4254237939).

131881375117 is an equidigital number, since it uses as much as digits as its factorization.

131881375117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4254237938.

The product of its digits is 141120, while the sum is 46.

The spelling of 131881375117 in words is "one hundred thirty-one billion, eight hundred eighty-one million, three hundred seventy-five thousand, one hundred seventeen".