231317090217 has 12 divisors (see below), whose sum is σ = 334128902640. Its totient is φ = 154209447288.

The previous prime is 231317090201. The next prime is 231317090219. The reversal of 231317090217 is 712090713132.

It is a happy number.

231317090217 is a `hidden beast` number, since 231 + 317 + 0 + 90 + 21 + 7 = 666.

It is not a de Polignac number, because 231317090217 - 2⁴ = 231317090201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231317090219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1145578 + ... + 1332284.

It is an arithmetic number, because the mean of its divisors is an integer number (27844075220).

Almost surely, 2^231317090217 is an apocalyptic number.

It is an amenable number.

231317090217 is a deficient number, since it is larger than the sum of its proper divisors (102811812423).

231317090217 is a wasteful number, since it uses less digits than its factorization.

231317090217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324372 (or 324369 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 36.

The spelling of 231317090217 in words is "two hundred thirty-one billion, three hundred seventeen million, ninety thousand, two hundred seventeen".