131081 has 4 divisors (see below), whose sum is σ = 138000. Its totient is φ = 124164.

The previous prime is 131071. The next prime is 131101. The reversal of 131081 is 180131.

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, and also an emirpimes, since its reverse is a distinct semiprime: 180131 = 7 ⋅25733.

It is a cyclic number.

It is not a de Polignac number, because 131081 - 2¹⁰ = 130057 is a prime.

It is a super-2 number, since 2×131081² = 34364457122, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (131011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (3) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3431 + ... + 3468.

It is an arithmetic number, because the mean of its divisors is an integer number (34500).

2¹³¹⁰⁸¹ is an apocalyptic number.

It is an amenable number.

131081 is a deficient number, since it is larger than the sum of its proper divisors (6919).

131081 is an equidigital number, since it uses as much as digits as its factorization.

131081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6918.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 131081 is about 362.0511013655. The cubic root of 131081 is about 50.7979962836.

The spelling of 131081 in words is "one hundred thirty-one thousand, eighty-one".