231210263 has 2 divisors, whose sum is σ = 231210264. Its totient is φ = 231210262.

The previous prime is 231210227. The next prime is 231210277. The reversal of 231210263 is 362012132.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231210263 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231210223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115605131 + 115605132.

It is an arithmetic number, because the mean of its divisors is an integer number (115605132).

Almost surely, 2^231210263 is an apocalyptic number.

231210263 is a deficient number, since it is larger than the sum of its proper divisors (1).

231210263 is an equidigital number, since it uses as much as digits as its factorization.

231210263 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 231210263 is about 15205.5997251013. The cubic root of 231210263 is about 613.7653534735.

Adding to 231210263 its reverse (362012132), we get a palindrome (593222395).

The spelling of 231210263 in words is "two hundred thirty-one million, two hundred ten thousand, two hundred sixty-three".