131326243 has 2 divisors, whose sum is σ = 131326244. Its totient is φ = 131326242.

The previous prime is 131326201. The next prime is 131326249. The reversal of 131326243 is 342623131.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131326243 is a prime.

It is not a weakly prime, because it can be changed into another prime (131326249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65663121 + 65663122.

It is an arithmetic number, because the mean of its divisors is an integer number (65663122).

Almost surely, 2^131326243 is an apocalyptic number.

131326243 is a deficient number, since it is larger than the sum of its proper divisors (1).

131326243 is an equidigital number, since it uses as much as digits as its factorization.

131326243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 25.

The square root of 131326243 is about 11459.7662716130. The cubic root of 131326243 is about 508.2965633053.

Adding to 131326243 its reverse (342623131), we get a palindrome (473949374).

It can be divided in two parts, 1313 and 26243, that added together give a square (27556 = 166²).

The spelling of 131326243 in words is "one hundred thirty-one million, three hundred twenty-six thousand, two hundred forty-three".