231242507 has 2 divisors, whose sum is σ = 231242508. Its totient is φ = 231242506.

The previous prime is 231242467. The next prime is 231242509. The reversal of 231242507 is 705242132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231242507 - 2¹² = 231238411 is a prime.

Together with 231242509, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (231242509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115621253 + 115621254.

It is an arithmetic number, because the mean of its divisors is an integer number (115621254).

Almost surely, 2^231242507 is an apocalyptic number.

231242507 is a deficient number, since it is larger than the sum of its proper divisors (1).

231242507 is an equidigital number, since it uses as much as digits as its factorization.

231242507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 231242507 is about 15206.6599554274. The cubic root of 231242507 is about 613.7938835365.

Adding to 231242507 its reverse (705242132), we get a palindrome (936484639).

The spelling of 231242507 in words is "two hundred thirty-one million, two hundred forty-two thousand, five hundred seven".