231800011 has 2 divisors, whose sum is σ = 231800012. Its totient is φ = 231800010.

The previous prime is 231799999. The next prime is 231800021. The reversal of 231800011 is 110008132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231800011 - 2¹¹ = 231797963 is a prime.

It is not a weakly prime, because it can be changed into another prime (231800021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115900005 + 115900006.

It is an arithmetic number, because the mean of its divisors is an integer number (115900006).

Almost surely, 2^231800011 is an apocalyptic number.

231800011 is a deficient number, since it is larger than the sum of its proper divisors (1).

231800011 is an equidigital number, since it uses as much as digits as its factorization.

231800011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 231800011 is about 15224.9798357830. The cubic root of 231800011 is about 614.2867541588.

Adding to 231800011 its reverse (110008132), we get a palindrome (341808143).

The spelling of 231800011 in words is "two hundred thirty-one million, eight hundred thousand, eleven".