231312041355205 has 8 divisors (see below), whose sum is σ = 277587103012632. Its totient is φ = 185041197493248.

The previous prime is 231312041355149. The next prime is 231312041355209. The reversal of 231312041355205 is 502553140213132.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 49630136957956 + 181681904397249 = 7044866^2 + 13478943^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231312041355205 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 (231312041355209) 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, 1054328212 + ... + 1054547581.

It is an arithmetic number, because the mean of its divisors is an integer number (34698387876579).

Almost surely, 2^{231312041355205} is an apocalyptic number.

It is an amenable number.

231312041355205 is a deficient number, since it is larger than the sum of its proper divisors (46275061657427).

231312041355205 is a wasteful number, since it uses less digits than its factorization.

231312041355205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2108897735.

The product of its (nonzero) digits is 108000, while the sum is 37.

Adding to 231312041355205 its reverse (502553140213132), we get a palindrome (733865181568337).

The spelling of 231312041355205 in words is "two hundred thirty-one trillion, three hundred twelve billion, forty-one million, three hundred fifty-five thousand, two hundred five".