131344681 has 4 divisors (see below), whose sum is σ = 141448132. Its totient is φ = 121241232.

The previous prime is 131344639. The next prime is 131344691. The reversal of 131344681 is 186443131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5546025 + 125798656 = 2355^2 + 11216^2 .

It is a cyclic number.

It is not a de Polignac number, because 131344681 - 2¹¹ = 131342633 is a prime.

It is a super-2 number, since 2×131344681² = 34502850453983522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131344691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5051706 + ... + 5051731.

It is an arithmetic number, because the mean of its divisors is an integer number (35362033).

Almost surely, 2^131344681 is an apocalyptic number.

It is an amenable number.

131344681 is a deficient number, since it is larger than the sum of its proper divisors (10103451).

131344681 is a wasteful number, since it uses less digits than its factorization.

131344681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10103450.

The product of its digits is 6912, while the sum is 31.

The square root of 131344681 is about 11460.5707100476. The cubic root of 131344681 is about 508.3203502074.

The spelling of 131344681 in words is "one hundred thirty-one million, three hundred forty-four thousand, six hundred eighty-one".