131131543 has 2 divisors, whose sum is σ = 131131544. Its totient is φ = 131131542.

The previous prime is 131131493. The next prime is 131131577. The reversal of 131131543 is 345131131.

It is a strong prime.

It is an emirp because it is prime and its reverse (345131131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131131543 - 2⁹ = 131131031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131131043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65565771 + 65565772.

It is an arithmetic number, because the mean of its divisors is an integer number (65565772).

Almost surely, 2^131131543 is an apocalyptic number.

131131543 is a deficient number, since it is larger than the sum of its proper divisors (1).

131131543 is an equidigital number, since it uses as much as digits as its factorization.

131131543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 540, while the sum is 22.

The square root of 131131543 is about 11451.2681830442. The cubic root of 131131543 is about 508.0452444357.

Adding to 131131543 its reverse (345131131), we get a palindrome (476262674).

The spelling of 131131543 in words is "one hundred thirty-one million, one hundred thirty-one thousand, five hundred forty-three".