231648863 has 2 divisors, whose sum is σ = 231648864. Its totient is φ = 231648862.

The previous prime is 231648827. The next prime is 231648887. The reversal of 231648863 is 368846132.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231648863 - 2⁶ = 231648799 is a prime.

It is a super-2 number, since 2×231648863² = 107322391458385538, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231648863.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231648463) 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, 115824431 + 115824432.

It is an arithmetic number, because the mean of its divisors is an integer number (115824432).

Almost surely, 2^231648863 is an apocalyptic number.

231648863 is a deficient number, since it is larger than the sum of its proper divisors (1).

231648863 is an equidigital number, since it uses as much as digits as its factorization.

231648863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 165888, while the sum is 41.

The square root of 231648863 is about 15220.0152102421. The cubic root of 231648863 is about 614.1532074257.

The spelling of 231648863 in words is "two hundred thirty-one million, six hundred forty-eight thousand, eight hundred sixty-three".