231043313 has 2 divisors, whose sum is σ = 231043314. Its totient is φ = 231043312.

The previous prime is 231043297. The next prime is 231043339. The reversal of 231043313 is 313340132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 226412209 + 4631104 = 15047^2 + 2152^2 .

It is a cyclic number.

It is not a de Polignac number, because 231043313 - 2⁴ = 231043297 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (231043913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115521656 + 115521657.

It is an arithmetic number, because the mean of its divisors is an integer number (115521657).

Almost surely, 2^231043313 is an apocalyptic number.

It is an amenable number.

231043313 is a deficient number, since it is larger than the sum of its proper divisors (1).

231043313 is an equidigital number, since it uses as much as digits as its factorization.

231043313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 231043313 is about 15200.1089798725. The cubic root of 231043313 is about 613.6175907150.

Adding to 231043313 its reverse (313340132), we get a palindrome (544383445).

The spelling of 231043313 in words is "two hundred thirty-one million, forty-three thousand, three hundred thirteen".