203031232013 has 2 divisors, whose sum is σ = 203031232014. Its totient is φ = 203031232012.

The previous prime is 203031231989. The next prime is 203031232031. The reversal of 203031232013 is 310232130302.

Together with next prime (203031232031) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 150095806084 + 52935425929 = 387422^2 + 230077^2 .

It is a cyclic number.

It is not a de Polignac number, because 203031232013 - 2²² = 203027037709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203031232513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101515616006 + 101515616007.

It is an arithmetic number, because the mean of its divisors is an integer number (101515616007).

Almost surely, 2^203031232013 is an apocalyptic number.

It is an amenable number.

203031232013 is a deficient number, since it is larger than the sum of its proper divisors (1).

203031232013 is an equidigital number, since it uses as much as digits as its factorization.

203031232013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 203031232013 its reverse (310232130302), we get a palindrome (513263362315).

The spelling of 203031232013 in words is "two hundred three billion, thirty-one million, two hundred thirty-two thousand, thirteen".