2003131031309 has 2 divisors, whose sum is σ = 2003131031310. Its totient is φ = 2003131031308.

The previous prime is 2003131031303. The next prime is 2003131031353. The reversal of 2003131031309 is 9031301313002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1318007322025 + 685123709284 = 1148045^2 + 827722^2 .

It is a cyclic number.

It is not a de Polignac number, because 2003131031309 - 2⁸ = 2003131031053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2003131031303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001565515654 + 1001565515655.

It is an arithmetic number, because the mean of its divisors is an integer number (1001565515655).

Almost surely, 2^{2003131031309} is an apocalyptic number.

It is an amenable number.

2003131031309 is a deficient number, since it is larger than the sum of its proper divisors (1).

2003131031309 is an equidigital number, since it uses as much as digits as its factorization.

2003131031309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 26.

The spelling of 2003131031309 in words is "two trillion, three billion, one hundred thirty-one million, thirty-one thousand, three hundred nine".