231231199 has 2 divisors, whose sum is σ = 231231200. Its totient is φ = 231231198.

The previous prime is 231231191. The next prime is 231231251. The reversal of 231231199 is 991132132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231231199 - 2³ = 231231191 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231231199.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231231191) 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, 115615599 + 115615600.

It is an arithmetic number, because the mean of its divisors is an integer number (115615600).

Almost surely, 2^231231199 is an apocalyptic number.

231231199 is a deficient number, since it is larger than the sum of its proper divisors (1).

231231199 is an equidigital number, since it uses as much as digits as its factorization.

231231199 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2916, while the sum is 31.

The square root of 231231199 is about 15206.2881401084. The cubic root of 231231199 is about 613.7838783196.

The spelling of 231231199 in words is "two hundred thirty-one million, two hundred thirty-one thousand, one hundred ninety-nine".