131612543 has 2 divisors, whose sum is σ = 131612544. Its totient is φ = 131612542.

The previous prime is 131612531. The next prime is 131612573. The reversal of 131612543 is 345216131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131612543 - 2⁶ = 131612479 is a prime.

It is a super-2 number, since 2×131612543² = 34643722949853698, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131612573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65806271 + 65806272.

It is an arithmetic number, because the mean of its divisors is an integer number (65806272).

Almost surely, 2^131612543 is an apocalyptic number.

131612543 is a deficient number, since it is larger than the sum of its proper divisors (1).

131612543 is an equidigital number, since it uses as much as digits as its factorization.

131612543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 26.

The square root of 131612543 is about 11472.2509996949. The cubic root of 131612543 is about 508.6656687204.

Adding to 131612543 its reverse (345216131), we get a palindrome (476828674).

The spelling of 131612543 in words is "one hundred thirty-one million, six hundred twelve thousand, five hundred forty-three".