131365771 has 4 divisors (see below), whose sum is σ = 131396200. Its totient is φ = 131335344.

The previous prime is 131365769. The next prime is 131365813. The reversal of 131365771 is 177563131.

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 131365771 - 2¹ = 131365769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131365721) 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, 7401 + ... + 17818.

It is an arithmetic number, because the mean of its divisors is an integer number (32849050).

Almost surely, 2^131365771 is an apocalyptic number.

131365771 is a deficient number, since it is larger than the sum of its proper divisors (30429).

131365771 is an equidigital number, since it uses as much as digits as its factorization.

131365771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30428.

The product of its digits is 13230, while the sum is 34.

The square root of 131365771 is about 11461.4907843613. The cubic root of 131365771 is about 508.3475557310.

The spelling of 131365771 in words is "one hundred thirty-one million, three hundred sixty-five thousand, seven hundred seventy-one".