231199 has 4 divisors (see below), whose sum is σ = 236880. Its totient is φ = 225520.

The previous prime is 231197. The next prime is 231223. The reversal of 231199 is 991132.

231199 is nontrivially palindromic in base 15.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 231199 - 2¹ = 231197 is a prime.

It is a Duffinian number.

231199 is a lucky number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2779 + ... + 2860.

It is an arithmetic number, because the mean of its divisors is an integer number (59220).

2²³¹¹⁹⁹ is an apocalyptic number.

231199 is a deficient number, since it is larger than the sum of its proper divisors (5681).

231199 is an equidigital number, since it uses as much as digits as its factorization.

231199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5680.

The product of its digits is 486, while the sum is 25.

The square root of 231199 is about 480.8315713428. The cubic root of 231199 is about 61.3755387146.

The spelling of 231199 in words is "two hundred thirty-one thousand, one hundred ninety-nine".