231995199 has 4 divisors (see below), whose sum is σ = 309326936. Its totient is φ = 154663464.

The previous prime is 231995177. The next prime is 231995201. The reversal of 231995199 is 991599132.

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

It is not a de Polignac number, because 231995199 - 2⁵ = 231995167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231995119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38665864 + ... + 38665869.

It is an arithmetic number, because the mean of its divisors is an integer number (77331734).

Almost surely, 2^231995199 is an apocalyptic number.

231995199 is a deficient number, since it is larger than the sum of its proper divisors (77331737).

231995199 is an equidigital number, since it uses as much as digits as its factorization.

231995199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77331736.

The product of its digits is 196830, while the sum is 48.

The square root of 231995199 is about 15231.3886103664. The cubic root of 231995199 is about 614.4591265467.

The spelling of 231995199 in words is "two hundred thirty-one million, nine hundred ninety-five thousand, one hundred ninety-nine".