131801910971 has 4 divisors (see below), whose sum is σ = 131803159944. Its totient is φ = 131800662000.

The previous prime is 131801910959. The next prime is 131801911049. The reversal of 131801910971 is 179019108131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 179019108131 = 163 ⋅1098276737.

It is a cyclic number.

It is not a de Polignac number, because 131801910971 - 2⁶ = 131801910907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131801910931) 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, 449930 + ... + 682671.

It is an arithmetic number, because the mean of its divisors is an integer number (32950789986).

Almost surely, 2^131801910971 is an apocalyptic number.

131801910971 is a deficient number, since it is larger than the sum of its proper divisors (1248973).

131801910971 is a wasteful number, since it uses less digits than its factorization.

131801910971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1248972.

The product of its (nonzero) digits is 13608, while the sum is 41.

The spelling of 131801910971 in words is "one hundred thirty-one billion, eight hundred one million, nine hundred ten thousand, nine hundred seventy-one".