231868205 has 4 divisors (see below), whose sum is σ = 278241852. Its totient is φ = 185494560.

The previous prime is 231868199. The next prime is 231868207. The reversal of 231868205 is 502868132.

231868205 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 99940009 + 131928196 = 9997^2 + 11486^2 .

It is not a de Polignac number, because 231868205 - 2⁸ = 231867949 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231868207) 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, 23186816 + ... + 23186825.

It is an arithmetic number, because the mean of its divisors is an integer number (69560463).

Almost surely, 2^231868205 is an apocalyptic number.

It is an amenable number.

231868205 is a deficient number, since it is larger than the sum of its proper divisors (46373647).

231868205 is an equidigital number, since it uses as much as digits as its factorization.

231868205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46373646.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 231868205 is about 15227.2192142886. The cubic root of 231868205 is about 614.3469879258.

The spelling of 231868205 in words is "two hundred thirty-one million, eight hundred sixty-eight thousand, two hundred five".