31313331329 has 4 divisors (see below), whose sum is σ = 35786664384. Its totient is φ = 26839998276.

The previous prime is 31313331323. The next prime is 31313331337. The reversal of 31313331329 is 92313331313.

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.

It is not a de Polignac number, because 31313331329 - 2¹² = 31313327233 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31313331295 and 31313331304.

It is not an unprimeable number, because it can be changed into a prime (31313331323) 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, 2236666517 + ... + 2236666530.

It is an arithmetic number, because the mean of its divisors is an integer number (8946666096).

Almost surely, 2^31313331329 is an apocalyptic number.

It is an amenable number.

31313331329 is a deficient number, since it is larger than the sum of its proper divisors (4473333055).

31313331329 is an equidigital number, since it uses as much as digits as its factorization.

31313331329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4473333054.

The product of its digits is 13122, while the sum is 32.

The spelling of 31313331329 in words is "thirty-one billion, three hundred thirteen million, three hundred thirty-one thousand, three hundred twenty-nine".