131213242331 has 2 divisors, whose sum is σ = 131213242332. Its totient is φ = 131213242330.

The previous prime is 131213242297. The next prime is 131213242351. The reversal of 131213242331 is 133242312131.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131213242331 - 2¹⁰ = 131213241307 is a prime.

It is a super-2 number, since 2×131213242331² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 131213242331.

It is not a weakly prime, because it can be changed into another prime (131213242351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65606621165 + 65606621166.

It is an arithmetic number, because the mean of its divisors is an integer number (65606621166).

Almost surely, 2^131213242331 is an apocalyptic number.

131213242331 is a deficient number, since it is larger than the sum of its proper divisors (1).

131213242331 is an equidigital number, since it uses as much as digits as its factorization.

131213242331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 26.

Adding to 131213242331 its reverse (133242312131), we get a palindrome (264455554462).

The spelling of 131213242331 in words is "one hundred thirty-one billion, two hundred thirteen million, two hundred forty-two thousand, three hundred thirty-one".