231139241 has 2 divisors, whose sum is σ = 231139242. Its totient is φ = 231139240.

The previous prime is 231139231. The next prime is 231139253. The reversal of 231139241 is 142931132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127690000 + 103449241 = 11300^2 + 10171^2 .

It is a cyclic number.

It is not a de Polignac number, because 231139241 - 2⁶ = 231139177 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231139241.

It is not a weakly prime, because it can be changed into another prime (231139211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115569620 + 115569621.

It is an arithmetic number, because the mean of its divisors is an integer number (115569621).

Almost surely, 2^231139241 is an apocalyptic number.

It is an amenable number.

231139241 is a deficient number, since it is larger than the sum of its proper divisors (1).

231139241 is an equidigital number, since it uses as much as digits as its factorization.

231139241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 26.

The square root of 231139241 is about 15203.2641560949. The cubic root of 231139241 is about 613.7025025912.

The spelling of 231139241 in words is "two hundred thirty-one million, one hundred thirty-nine thousand, two hundred forty-one".