231247241 has 2 divisors, whose sum is σ = 231247242. Its totient is φ = 231247240.

The previous prime is 231247207. The next prime is 231247297. The reversal of 231247241 is 142742132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127125625 + 104121616 = 11275^2 + 10204^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231247241 is a prime.

It is a super-2 number, since 2×231247241² = 106950572940224162, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231247241.

It is not a weakly prime, because it can be changed into another prime (231247441) 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, 115623620 + 115623621.

It is an arithmetic number, because the mean of its divisors is an integer number (115623621).

Almost surely, 2^231247241 is an apocalyptic number.

It is an amenable number.

231247241 is a deficient number, since it is larger than the sum of its proper divisors (1).

231247241 is an equidigital number, since it uses as much as digits as its factorization.

231247241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2688, while the sum is 26.

The square root of 231247241 is about 15206.8156101138. The cubic root of 231247241 is about 613.7980720404.

Adding to 231247241 its reverse (142742132), we get a palindrome (373989373).

The spelling of 231247241 in words is "two hundred thirty-one million, two hundred forty-seven thousand, two hundred forty-one".