131313031243 has 4 divisors (see below), whose sum is σ = 131517888408. Its totient is φ = 131108174080.

The previous prime is 131313031229. The next prime is 131313031247. The reversal of 131313031243 is 342130313131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342130313131 = 53 ⋅6455288927.

It is a cyclic number.

It is not a de Polignac number, because 131313031243 - 2⁹ = 131313030731 is a prime.

It is a super-2 number, since 2×131313031243² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131313031247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102427621 + ... + 102428902.

It is an arithmetic number, because the mean of its divisors is an integer number (32879472102).

Almost surely, 2^131313031243 is an apocalyptic number.

131313031243 is a deficient number, since it is larger than the sum of its proper divisors (204857165).

131313031243 is an equidigital number, since it uses as much as digits as its factorization.

131313031243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204857164.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 131313031243 its reverse (342130313131), we get a palindrome (473443344374).

The spelling of 131313031243 in words is "one hundred thirty-one billion, three hundred thirteen million, thirty-one thousand, two hundred forty-three".