131324381 has 2 divisors, whose sum is σ = 131324382. Its totient is φ = 131324380.

The previous prime is 131324363. The next prime is 131324387. The reversal of 131324381 is 183423131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74563225 + 56761156 = 8635^2 + 7534^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131324381 is a prime.

It is a super-2 number, since 2×131324381² = 34492186090066322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 131324381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131324387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65662190 + 65662191.

It is an arithmetic number, because the mean of its divisors is an integer number (65662191).

Almost surely, 2^131324381 is an apocalyptic number.

It is an amenable number.

131324381 is a deficient number, since it is larger than the sum of its proper divisors (1).

131324381 is an equidigital number, since it uses as much as digits as its factorization.

131324381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 26.

The square root of 131324381 is about 11459.6850305757. The cubic root of 131324381 is about 508.2941610114.

The spelling of 131324381 in words is "one hundred thirty-one million, three hundred twenty-four thousand, three hundred eighty-one".