231210311205 has 16 divisors (see below), whose sum is σ = 370003011840. Its totient is φ = 123289994688.

The previous prime is 231210311141. The next prime is 231210311219. The reversal of 231210311205 is 502113012132.

It is not a de Polignac number, because 231210311205 - 2⁶ = 231210311141 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1299325 + ... + 1466514.

It is an arithmetic number, because the mean of its divisors is an integer number (23125188240).

Almost surely, 2^231210311205 is an apocalyptic number.

It is an amenable number.

231210311205 is a deficient number, since it is larger than the sum of its proper divisors (138792700635).

231210311205 is a wasteful number, since it uses less digits than its factorization.

231210311205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2771420.

The product of its (nonzero) digits is 360, while the sum is 21.

Adding to 231210311205 its reverse (502113012132), we get a palindrome (733323323337).

The spelling of 231210311205 in words is "two hundred thirty-one billion, two hundred ten million, three hundred eleven thousand, two hundred five".