313131243133 has 4 divisors (see below), whose sum is σ = 323232251008. Its totient is φ = 303030235260.

The previous prime is 313131243109. The next prime is 313131243143. The reversal of 313131243133 is 331342131313.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 331342131313 = 3491 ⋅94913243.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-313131243133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313131243143) 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 in 3 ways as a sum of consecutive naturals, for example, 5050503891 + ... + 5050503952.

It is an arithmetic number, because the mean of its divisors is an integer number (80808062752).

Almost surely, 2^313131243133 is an apocalyptic number.

It is an amenable number.

313131243133 is a deficient number, since it is larger than the sum of its proper divisors (10101007875).

313131243133 is a wasteful number, since it uses less digits than its factorization.

313131243133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10101007874.

The product of its digits is 5832, while the sum is 28.

Adding to 313131243133 its reverse (331342131313), we get a palindrome (644473374446).

The spelling of 313131243133 in words is "three hundred thirteen billion, one hundred thirty-one million, two hundred forty-three thousand, one hundred thirty-three".