231135013 has 2 divisors, whose sum is σ = 231135014. Its totient is φ = 231135012.

The previous prime is 231135011. The next prime is 231135031. The reversal of 231135013 is 310531132.

Together with next prime (231135031) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 230523489 + 611524 = 15183^2 + 782^2 .

It is a cyclic number.

It is not a de Polignac number, because 231135013 - 2¹ = 231135011 is a prime.

Together with 231135011, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231135011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115567506 + 115567507.

It is an arithmetic number, because the mean of its divisors is an integer number (115567507).

Almost surely, 2^231135013 is an apocalyptic number.

It is an amenable number.

231135013 is a deficient number, since it is larger than the sum of its proper divisors (1).

231135013 is an equidigital number, since it uses as much as digits as its factorization.

231135013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 270, while the sum is 19.

The square root of 231135013 is about 15203.1251063720. The cubic root of 231135013 is about 613.6987606188.

Adding to 231135013 its reverse (310531132), we get a palindrome (541666145).

The spelling of 231135013 in words is "two hundred thirty-one million, one hundred thirty-five thousand, thirteen".