131231323 has 2 divisors, whose sum is σ = 131231324. Its totient is φ = 131231322.

The previous prime is 131231299. The next prime is 131231363. The reversal of 131231323 is 323132131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131231323 - 2⁵ = 131231291 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131231323.

It is not a weakly prime, because it can be changed into another prime (131231363) 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, 65615661 + 65615662.

It is an arithmetic number, because the mean of its divisors is an integer number (65615662).

Almost surely, 2^131231323 is an apocalyptic number.

131231323 is a deficient number, since it is larger than the sum of its proper divisors (1).

131231323 is an equidigital number, since it uses as much as digits as its factorization.

131231323 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 324, while the sum is 19.

The square root of 131231323 is about 11455.6240772819. The cubic root of 131231323 is about 508.1740715690.

Adding to 131231323 its reverse (323132131), we get a palindrome (454363454).

The spelling of 131231323 in words is "one hundred thirty-one million, two hundred thirty-one thousand, three hundred twenty-three".