313131132031 has 4 divisors (see below), whose sum is σ = 313874911864. Its totient is φ = 312387352200.

The previous prime is 313131131993. The next prime is 313131132049. The reversal of 313131132031 is 130231131313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130231131313 = 22013 ⋅5916101.

It is a cyclic number.

It is not a de Polignac number, because 313131132031 - 2³³ = 304541197439 is a prime.

It is a super-2 number, since 2×313131132031² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 313131131993 and 313131132011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313131130031) 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, 371889285 + ... + 371890126.

It is an arithmetic number, because the mean of its divisors is an integer number (78468727966).

Almost surely, 2^313131132031 is an apocalyptic number.

313131132031 is a deficient number, since it is larger than the sum of its proper divisors (743779833).

313131132031 is an equidigital number, since it uses as much as digits as its factorization.

313131132031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 743779832.

The product of its (nonzero) digits is 486, while the sum is 22.

Adding to 313131132031 its reverse (130231131313), we get a palindrome (443362263344).

The spelling of 313131132031 in words is "three hundred thirteen billion, one hundred thirty-one million, one hundred thirty-two thousand, thirty-one".