103031020313 has 4 divisors (see below), whose sum is σ = 110956483428. Its totient is φ = 95105557200.

The previous prime is 103031020307. The next prime is 103031020361. The reversal of 103031020313 is 313020130301.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 313020130301 = 58603 ⋅5341367.

It can be written as a sum of positive squares in 2 ways, for example, as 37508843584 + 65522176729 = 193672^2 + 255973^2 .

It is a cyclic number.

It is not a de Polignac number, because 103031020313 - 2³⁴ = 85851151129 is a prime.

It is a super-2 number, since 2×103031020313² (a number of 23 digits) contains 22 as substring.

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 = 103031020291 and 103031020300.

It is not an unprimeable number, because it can be changed into a prime (103031020513) 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, 3962731538 + ... + 3962731563.

It is an arithmetic number, because the mean of its divisors is an integer number (27739120857).

Almost surely, 2^103031020313 is an apocalyptic number.

103031020313 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

103031020313 is a deficient number, since it is larger than the sum of its proper divisors (7925463115).

103031020313 is an equidigital number, since it uses as much as digits as its factorization.

103031020313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7925463114.

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

Adding to 103031020313 its reverse (313020130301), we get a palindrome (416051150614).

The spelling of 103031020313 in words is "one hundred three billion, thirty-one million, twenty thousand, three hundred thirteen".