231715663 has 2 divisors, whose sum is σ = 231715664. Its totient is φ = 231715662.

The previous prime is 231715643. The next prime is 231715703. The reversal of 231715663 is 366517132.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231715663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231715613) 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, 115857831 + 115857832.

It is an arithmetic number, because the mean of its divisors is an integer number (115857832).

Almost surely, 2^231715663 is an apocalyptic number.

231715663 is a deficient number, since it is larger than the sum of its proper divisors (1).

231715663 is an equidigital number, since it uses as much as digits as its factorization.

231715663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 34.

The square root of 231715663 is about 15222.2095308138. The cubic root of 231715663 is about 614.2122356908.

The spelling of 231715663 in words is "two hundred thirty-one million, seven hundred fifteen thousand, six hundred sixty-three".