131326831 has 4 divisors (see below), whose sum is σ = 131359072. Its totient is φ = 131294592.

The previous prime is 131326829. The next prime is 131326837. The reversal of 131326831 is 138623131.

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 131326831 - 2¹ = 131326829 is a prime.

It is a super-2 number, since 2×131326831² = 34493473081005122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131326831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131326837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8946 + ... + 18511.

It is an arithmetic number, because the mean of its divisors is an integer number (32839768).

Almost surely, 2^131326831 is an apocalyptic number.

131326831 is a deficient number, since it is larger than the sum of its proper divisors (32241).

131326831 is an equidigital number, since it uses as much as digits as its factorization.

131326831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32240.

The product of its digits is 2592, while the sum is 28.

The square root of 131326831 is about 11459.7919265578. The cubic root of 131326831 is about 508.2973219197.

Adding to 131326831 its reverse (138623131), we get a palindrome (269949962).

The spelling of 131326831 in words is "one hundred thirty-one million, three hundred twenty-six thousand, eight hundred thirty-one".