231312205 has 8 divisors (see below), whose sum is σ = 278007552. Its totient is φ = 184761168.

The previous prime is 231312203. The next prime is 231312209. The reversal of 231312205 is 502213132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231312205 - 2¹ = 231312203 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 (231312203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32517 + ... + 38986.

It is an arithmetic number, because the mean of its divisors is an integer number (34750944).

Almost surely, 2^231312205 is an apocalyptic number.

It is an amenable number.

231312205 is a deficient number, since it is larger than the sum of its proper divisors (46695347).

231312205 is an equidigital number, since it uses as much as digits as its factorization.

231312205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72155.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 231312205 is about 15208.9514760223. The cubic root of 231312205 is about 613.8555445020.

Adding to 231312205 its reverse (502213132), we get a palindrome (733525337).

The spelling of 231312205 in words is "two hundred thirty-one million, three hundred twelve thousand, two hundred five".