231523207 has 2 divisors, whose sum is σ = 231523208. Its totient is φ = 231523206.

The previous prime is 231523199. The next prime is 231523217. The reversal of 231523207 is 702325132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231523207 - 2³ = 231523199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231523217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115761603 + 115761604.

It is an arithmetic number, because the mean of its divisors is an integer number (115761604).

Almost surely, 2^231523207 is an apocalyptic number.

231523207 is a deficient number, since it is larger than the sum of its proper divisors (1).

231523207 is an equidigital number, since it uses as much as digits as its factorization.

231523207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 231523207 is about 15215.8866649302. The cubic root of 231523207 is about 614.0421399068.

Adding to 231523207 its reverse (702325132), we get a palindrome (933848339).

The spelling of 231523207 in words is "two hundred thirty-one million, five hundred twenty-three thousand, two hundred seven".