231258613 has 2 divisors, whose sum is σ = 231258614. Its totient is φ = 231258612.

The previous prime is 231258611. The next prime is 231258617. The reversal of 231258613 is 316852132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 176172529 + 55086084 = 13273^2 + 7422^2 .

It is a cyclic number.

It is not a de Polignac number, because 231258613 - 2¹ = 231258611 is a prime.

Together with 231258611, 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 (231258611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115629306 + 115629307.

It is an arithmetic number, because the mean of its divisors is an integer number (115629307).

Almost surely, 2^231258613 is an apocalyptic number.

It is an amenable number.

231258613 is a deficient number, since it is larger than the sum of its proper divisors (1).

231258613 is an equidigital number, since it uses as much as digits as its factorization.

231258613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 31.

The square root of 231258613 is about 15207.1895168042. The cubic root of 231258613 is about 613.8081334178.

The spelling of 231258613 in words is "two hundred thirty-one million, two hundred fifty-eight thousand, six hundred thirteen".