31310331113 has 4 divisors (see below), whose sum is σ = 31397546880. Its totient is φ = 31223115348.

The previous prime is 31310331103. The next prime is 31310331149. The reversal of 31310331113 is 31113301313.

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 a cyclic number.

It is not a de Polignac number, because 31310331113 - 2¹² = 31310327017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31310331103) 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, 43607345 + ... + 43608062.

It is an arithmetic number, because the mean of its divisors is an integer number (7849386720).

Almost surely, 2^31310331113 is an apocalyptic number.

It is an amenable number.

31310331113 is a deficient number, since it is larger than the sum of its proper divisors (87215767).

31310331113 is an equidigital number, since it uses as much as digits as its factorization.

31310331113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87215766.

The product of its (nonzero) digits is 243, while the sum is 20.

Adding to 31310331113 its reverse (31113301313), we get a palindrome (62423632426).

The spelling of 31310331113 in words is "thirty-one billion, three hundred ten million, three hundred thirty-one thousand, one hundred thirteen".