131312243 has 2 divisors, whose sum is σ = 131312244. Its totient is φ = 131312242.

The previous prime is 131312227. The next prime is 131312257. The reversal of 131312243 is 342213131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131312243 - 2⁴ = 131312227 is a prime.

It is not a weakly prime, because it can be changed into another prime (131312213) 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, 65656121 + 65656122.

It is an arithmetic number, because the mean of its divisors is an integer number (65656122).

Almost surely, 2^131312243 is an apocalyptic number.

131312243 is a deficient number, since it is larger than the sum of its proper divisors (1).

131312243 is an equidigital number, since it uses as much as digits as its factorization.

131312243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 20.

The square root of 131312243 is about 11459.1554226304. The cubic root of 131312243 is about 508.2785003891.

Adding to 131312243 its reverse (342213131), we get a palindrome (473525374).

The spelling of 131312243 in words is "one hundred thirty-one million, three hundred twelve thousand, two hundred forty-three".