231522241 has 2 divisors, whose sum is σ = 231522242. Its totient is φ = 231522240.

The previous prime is 231522233. The next prime is 231522251. The reversal of 231522241 is 142225132.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 211091841 + 20430400 = 14529^2 + 4520^2 .

It is a cyclic number.

It is not a de Polignac number, because 231522241 - 2³ = 231522233 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (231522251) 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, 115761120 + 115761121.

It is an arithmetic number, because the mean of its divisors is an integer number (115761121).

Almost surely, 2^231522241 is an apocalyptic number.

It is an amenable number.

231522241 is a deficient number, since it is larger than the sum of its proper divisors (1).

231522241 is an equidigital number, since it uses as much as digits as its factorization.

231522241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 960, while the sum is 22.

The square root of 231522241 is about 15215.8549217584. The cubic root of 231522241 is about 614.0412859024.

Adding to 231522241 its reverse (142225132), we get a palindrome (373747373).

The spelling of 231522241 in words is "two hundred thirty-one million, five hundred twenty-two thousand, two hundred forty-one".