2003031013 has 4 divisors (see below), whose sum is σ = 2030469868. Its totient is φ = 1975592160.

The previous prime is 2003031011. The next prime is 2003031047. The reversal of 2003031013 is 3101303002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1551808449 + 451222564 = 39393^2 + 21242^2 .

It is a cyclic number.

It is not a de Polignac number, because 2003031013 - 2¹ = 2003031011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2003030984 and 2003031002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2003031011) 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, 13719318 + ... + 13719463.

It is an arithmetic number, because the mean of its divisors is an integer number (507617467).

Almost surely, 2^2003031013 is an apocalyptic number.

It is an amenable number.

2003031013 is a deficient number, since it is larger than the sum of its proper divisors (27438855).

2003031013 is an equidigital number, since it uses as much as digits as its factorization.

2003031013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27438854.

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 2003031013 is about 44755.2344759806. The cubic root of 2003031013 is about 1260.5572014859.

Adding to 2003031013 its reverse (3101303002), we get a palindrome (5104334015).

The spelling of 2003031013 in words is "two billion, three million, thirty-one thousand, thirteen".