231078317 has 2 divisors, whose sum is σ = 231078318. Its totient is φ = 231078316.

The previous prime is 231078307. The next prime is 231078359. The reversal of 231078317 is 713870132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 156100036 + 74978281 = 12494^2 + 8659^2 .

It is a cyclic number.

It is not a de Polignac number, because 231078317 - 2¹⁰ = 231077293 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 (231078307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115539158 + 115539159.

It is an arithmetic number, because the mean of its divisors is an integer number (115539159).

Almost surely, 2^231078317 is an apocalyptic number.

It is an amenable number.

231078317 is a deficient number, since it is larger than the sum of its proper divisors (1).

231078317 is an equidigital number, since it uses as much as digits as its factorization.

231078317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 231078317 is about 15201.2603753768. The cubic root of 231078317 is about 613.6485776690.

The spelling of 231078317 in words is "two hundred thirty-one million, seventy-eight thousand, three hundred seventeen".