231982317 has 18 divisors (see below), whose sum is σ = 389794158. Its totient is φ = 132561072.

The previous prime is 231982307. The next prime is 231982321. The reversal of 231982317 is 713289132.

It can be written as a sum of positive squares in only one way, i.e., 159289641 + 72692676 = 12621^2 + 8526^2 .

It is not a de Polignac number, because 231982317 - 2⁶ = 231982253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231982307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 262578 + ... + 263459.

It is an arithmetic number, because the mean of its divisors is an integer number (21655231).

Almost surely, 2^231982317 is an apocalyptic number.

It is an amenable number.

231982317 is a deficient number, since it is larger than the sum of its proper divisors (157811841).

231982317 is a wasteful number, since it uses less digits than its factorization.

231982317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526057 (or 526047 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 231982317 is about 15230.9657277534. The cubic root of 231982317 is about 614.4477533099.

The spelling of 231982317 in words is "two hundred thirty-one million, nine hundred eighty-two thousand, three hundred seventeen".