231241247 has 2 divisors, whose sum is σ = 231241248. Its totient is φ = 231241246.

The previous prime is 231241207. The next prime is 231241291. The reversal of 231241247 is 742142132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231241247 - 2¹² = 231237151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231241207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115620623 + 115620624.

It is an arithmetic number, because the mean of its divisors is an integer number (115620624).

Almost surely, 2^231241247 is an apocalyptic number.

231241247 is a deficient number, since it is larger than the sum of its proper divisors (1).

231241247 is an equidigital number, since it uses as much as digits as its factorization.

231241247 is an evil number, because the sum of its binary digits is even.

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

The square root of 231241247 is about 15206.6185261550. The cubic root of 231241247 is about 613.7927687160.

Adding to 231241247 its reverse (742142132), we get a palindrome (973383379).

The spelling of 231241247 in words is "two hundred thirty-one million, two hundred forty-one thousand, two hundred forty-seven".