231313203013 has 2 divisors, whose sum is σ = 231313203014. Its totient is φ = 231313203012.

The previous prime is 231313203001. The next prime is 231313203041. The reversal of 231313203013 is 310302313132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 200881447204 + 30431755809 = 448198^2 + 174447^2 .

It is a cyclic number.

It is not a de Polignac number, because 231313203013 - 2³⁷ = 93874249541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231313203313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115656601506 + 115656601507.

It is an arithmetic number, because the mean of its divisors is an integer number (115656601507).

Almost surely, 2^231313203013 is an apocalyptic number.

It is an amenable number.

231313203013 is a deficient number, since it is larger than the sum of its proper divisors (1).

231313203013 is an equidigital number, since it uses as much as digits as its factorization.

231313203013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 231313203013 its reverse (310302313132), we get a palindrome (541615516145).

The spelling of 231313203013 in words is "two hundred thirty-one billion, three hundred thirteen million, two hundred three thousand, thirteen".