131443513 has 2 divisors, whose sum is σ = 131443514. Its totient is φ = 131443512.

The previous prime is 131443469. The next prime is 131443517. The reversal of 131443513 is 315344131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130942249 + 501264 = 11443^2 + 708^2 .

It is a cyclic number.

It is not a de Polignac number, because 131443513 - 2⁹ = 131443001 is a prime.

It is not a weakly prime, because it can be changed into another prime (131443517) 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 as a sum of consecutive naturals, namely, 65721756 + 65721757.

It is an arithmetic number, because the mean of its divisors is an integer number (65721757).

Almost surely, 2^131443513 is an apocalyptic number.

It is an amenable number.

131443513 is a deficient number, since it is larger than the sum of its proper divisors (1).

131443513 is an equidigital number, since it uses as much as digits as its factorization.

131443513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 25.

The square root of 131443513 is about 11464.8817263851. The cubic root of 131443513 is about 508.4478156439.

Adding to 131443513 its reverse (315344131), we get a palindrome (446787644).

The spelling of 131443513 in words is "one hundred thirty-one million, four hundred forty-three thousand, five hundred thirteen".