31120300313 has 4 divisors (see below), whose sum is σ = 31120764468. Its totient is φ = 31119836160.

The previous prime is 31120300301. The next prime is 31120300327. The reversal of 31120300313 is 31300302113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31300302113 = 4327 ⋅7233719.

It can be written as a sum of positive squares in 2 ways, for example, as 13227760144 + 17892540169 = 115012^2 + 133763^2 .

It is a cyclic number.

It is not a de Polignac number, because 31120300313 - 2¹⁶ = 31120234777 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31120300291 and 31120300300.

It is not an unprimeable number, because it can be changed into a prime (31120300333) 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, 110156 + ... + 272717.

It is an arithmetic number, because the mean of its divisors is an integer number (7780191117).

Almost surely, 2^31120300313 is an apocalyptic number.

It is an amenable number.

31120300313 is a deficient number, since it is larger than the sum of its proper divisors (464155).

31120300313 is an equidigital number, since it uses as much as digits as its factorization.

31120300313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464154.

The product of its (nonzero) digits is 162, while the sum is 17.

Adding to 31120300313 its reverse (31300302113), we get a palindrome (62420602426).

The spelling of 31120300313 in words is "thirty-one billion, one hundred twenty million, three hundred thousand, three hundred thirteen".