131224240331 has 2 divisors, whose sum is σ = 131224240332. Its totient is φ = 131224240330.

The previous prime is 131224240321. The next prime is 131224240333. The reversal of 131224240331 is 133042422131.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131224240331 is a prime.

It is a super-2 number, since 2×131224240331² (a number of 23 digits) contains 22 as substring.

Together with 131224240333, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131224240331.

It is not a weakly prime, because it can be changed into another prime (131224240333) 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, 65612120165 + 65612120166.

It is an arithmetic number, because the mean of its divisors is an integer number (65612120166).

Almost surely, 2^131224240331 is an apocalyptic number.

131224240331 is a deficient number, since it is larger than the sum of its proper divisors (1).

131224240331 is an equidigital number, since it uses as much as digits as its factorization.

131224240331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 131224240331 its reverse (133042422131), we get a palindrome (264266662462).

The spelling of 131224240331 in words is "one hundred thirty-one billion, two hundred twenty-four million, two hundred forty thousand, three hundred thirty-one".