231131273 has 2 divisors, whose sum is σ = 231131274. Its totient is φ = 231131272.

The previous prime is 231131233. The next prime is 231131317. The reversal of 231131273 is 372131132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 231131209 + 64 = 15203^2 + 8^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231131273 is a prime.

It is not a weakly prime, because it can be changed into another prime (231131233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115565636 + 115565637.

It is an arithmetic number, because the mean of its divisors is an integer number (115565637).

Almost surely, 2^231131273 is an apocalyptic number.

It is an amenable number.

231131273 is a deficient number, since it is larger than the sum of its proper divisors (1).

231131273 is an equidigital number, since it uses as much as digits as its factorization.

231131273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 756, while the sum is 23.

The square root of 231131273 is about 15203.0021048476. The cubic root of 231131273 is about 613.6954505105.

The spelling of 231131273 in words is "two hundred thirty-one million, one hundred thirty-one thousand, two hundred seventy-three".