131131243 has 12 divisors (see below), whose sum is σ = 139157928. Its totient is φ = 123488960.

The previous prime is 131131199. The next prime is 131131279. The reversal of 131131243 is 342131131.

It is not a de Polignac number, because 131131243 - 2¹³ = 131123051 is a prime.

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 131131243.

It is not an unprimeable number, because it can be changed into a prime (131131043) 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 11 ways as a sum of consecutive naturals, for example, 32580 + ... + 36382.

It is an arithmetic number, because the mean of its divisors is an integer number (11596494).

Almost surely, 2^131131243 is an apocalyptic number.

131131243 is a deficient number, since it is larger than the sum of its proper divisors (8026685).

131131243 is an equidigital number, since it uses as much as digits as its factorization.

131131243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3902 (or 3873 counting only the distinct ones).

The product of its digits is 216, while the sum is 19.

The square root of 131131243 is about 11451.2550840508. The cubic root of 131131243 is about 508.0448570037.

Adding to 131131243 its reverse (342131131), we get a palindrome (473262374).

The spelling of 131131243 in words is "one hundred thirty-one million, one hundred thirty-one thousand, two hundred forty-three".