231365317 has 2 divisors, whose sum is σ = 231365318. Its totient is φ = 231365316.

The previous prime is 231365311. The next prime is 231365347. The reversal of 231365317 is 713563132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129072321 + 102292996 = 11361^2 + 10114^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231365317 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231365311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115682658 + 115682659.

It is an arithmetic number, because the mean of its divisors is an integer number (115682659).

Almost surely, 2^231365317 is an apocalyptic number.

It is an amenable number.

231365317 is a deficient number, since it is larger than the sum of its proper divisors (1).

231365317 is an equidigital number, since it uses as much as digits as its factorization.

231365317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11340, while the sum is 31.

The square root of 231365317 is about 15210.6974527797. The cubic root of 231365317 is about 613.9025237217.

The spelling of 231365317 in words is "two hundred thirty-one million, three hundred sixty-five thousand, three hundred seventeen".