131371771 has 4 divisors (see below), whose sum is σ = 131750712. Its totient is φ = 130992832.

The previous prime is 131371759. The next prime is 131371781. The reversal of 131371771 is 177173131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 177173131 = 37 ⋅4788463.

It is a cyclic number.

It is not a de Polignac number, because 131371771 - 2⁵ = 131371739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131371781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188950 + ... + 189643.

It is an arithmetic number, because the mean of its divisors is an integer number (32937678).

Almost surely, 2^131371771 is an apocalyptic number.

131371771 is a deficient number, since it is larger than the sum of its proper divisors (378941).

131371771 is an equidigital number, since it uses as much as digits as its factorization.

131371771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378940.

The product of its digits is 3087, while the sum is 31.

The square root of 131371771 is about 11461.7525274279. The cubic root of 131371771 is about 508.3552950349.

The spelling of 131371771 in words is "one hundred thirty-one million, three hundred seventy-one thousand, seven hundred seventy-one".