131731841 has 8 divisors (see below), whose sum is σ = 133184040. Its totient is φ = 130284288.

The previous prime is 131731813. The next prime is 131731889. The reversal of 131731841 is 148137131.

It can be written as a sum of positive squares in 4 ways, for example, as 79834225 + 51897616 = 8935^2 + 7204^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131731841 - 2⁶ = 131731777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131431841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105875 + ... + 107111.

It is an arithmetic number, because the mean of its divisors is an integer number (16648005).

Almost surely, 2^131731841 is an apocalyptic number.

It is an amenable number.

131731841 is a deficient number, since it is larger than the sum of its proper divisors (1452199).

131731841 is a wasteful number, since it uses less digits than its factorization.

131731841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2323.

The product of its digits is 2016, while the sum is 29.

The square root of 131731841 is about 11477.4492375266. The cubic root of 131731841 is about 508.8193128180.

Adding to 131731841 its reverse (148137131), we get a palindrome (279868972).

The spelling of 131731841 in words is "one hundred thirty-one million, seven hundred thirty-one thousand, eight hundred forty-one".