131306543 has 2 divisors, whose sum is σ = 131306544. Its totient is φ = 131306542.

The previous prime is 131306537. The next prime is 131306551. The reversal of 131306543 is 345603131.

It is a weak prime.

It is an emirp because it is prime and its reverse (345603131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131306543 - 2¹² = 131302447 is a prime.

It is a super-2 number, since 2×131306543² = 34482816469221698, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131306573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65653271 + 65653272.

It is an arithmetic number, because the mean of its divisors is an integer number (65653272).

Almost surely, 2^131306543 is an apocalyptic number.

131306543 is a deficient number, since it is larger than the sum of its proper divisors (1).

131306543 is an equidigital number, since it uses as much as digits as its factorization.

131306543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 131306543 is about 11458.9067105025. The cubic root of 131306543 is about 508.2711458340.

Adding to 131306543 its reverse (345603131), we get a palindrome (476909674).

The spelling of 131306543 in words is "one hundred thirty-one million, three hundred six thousand, five hundred forty-three".