131212343 has 2 divisors, whose sum is σ = 131212344. Its totient is φ = 131212342.

The previous prime is 131212321. The next prime is 131212357. The reversal of 131212343 is 343212131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131212343 - 2¹⁰ = 131211319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131212303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65606171 + 65606172.

It is an arithmetic number, because the mean of its divisors is an integer number (65606172).

Almost surely, 2^131212343 is an apocalyptic number.

131212343 is a deficient number, since it is larger than the sum of its proper divisors (1).

131212343 is an equidigital number, since it uses as much as digits as its factorization.

131212343 is an evil number, because the sum of its binary digits is even.

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

The square root of 131212343 is about 11454.7956332708. The cubic root of 131212343 is about 508.1495712980.

Adding to 131212343 its reverse (343212131), we get a palindrome (474424474).

The spelling of 131212343 in words is "one hundred thirty-one million, two hundred twelve thousand, three hundred forty-three".