31301103313 has 4 divisors (see below), whose sum is σ = 31305435700. Its totient is φ = 31296770928.

The previous prime is 31301103311. The next prime is 31301103319. The reversal of 31301103313 is 31330110313.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31330110313 = 19777 ⋅1584169.

It can be written as a sum of positive squares in 2 ways, for example, as 16752642624 + 14548460689 = 129432^2 + 120617^2 .

It is a cyclic number.

It is not a de Polignac number, because 31301103313 - 2¹ = 31301103311 is a prime.

It is a super-2 number, since 2×31301103313² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31301103311) 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, 2155338 + ... + 2169811.

It is an arithmetic number, because the mean of its divisors is an integer number (7826358925).

Almost surely, 2^31301103313 is an apocalyptic number.

It is an amenable number.

31301103313 is a deficient number, since it is larger than the sum of its proper divisors (4332387).

31301103313 is an equidigital number, since it uses as much as digits as its factorization.

31301103313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4332386.

The product of its (nonzero) digits is 243, while the sum is 19.

Adding to 31301103313 its reverse (31330110313), we get a palindrome (62631213626).

The spelling of 31301103313 in words is "thirty-one billion, three hundred one million, one hundred three thousand, three hundred thirteen".