231031301 has 2 divisors, whose sum is σ = 231031302. Its totient is φ = 231031300.

The previous prime is 231031291. The next prime is 231031319. The reversal of 231031301 is 103130132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 228312100 + 2719201 = 15110^2 + 1649^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231031301 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231031321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115515650 + 115515651.

It is an arithmetic number, because the mean of its divisors is an integer number (115515651).

Almost surely, 2^231031301 is an apocalyptic number.

It is an amenable number.

231031301 is a deficient number, since it is larger than the sum of its proper divisors (1).

231031301 is an equidigital number, since it uses as much as digits as its factorization.

231031301 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 231031301 is about 15199.7138459907. The cubic root of 231031301 is about 613.6069564864.

Adding to 231031301 its reverse (103130132), we get a palindrome (334161433).

The spelling of 231031301 in words is "two hundred thirty-one million, thirty-one thousand, three hundred one".