317147231 has 4 divisors (see below), whose sum is σ = 324522792. Its totient is φ = 309771672.

The previous prime is 317147203. The next prime is 317147279. The reversal of 317147231 is 132741713.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132741713 = 13 ⋅10210901.

It is a cyclic number.

It is not a de Polignac number, because 317147231 - 2⁶ = 317147167 is a prime.

It is a super-2 number, since 2×317147231² = 201164732261934722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 317147194 and 317147203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (317147531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3687716 + ... + 3687801.

It is an arithmetic number, because the mean of its divisors is an integer number (81130698).

Almost surely, 2^317147231 is an apocalyptic number.

317147231 is a deficient number, since it is larger than the sum of its proper divisors (7375561).

317147231 is an equidigital number, since it uses as much as digits as its factorization.

317147231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7375560.

The product of its digits is 3528, while the sum is 29.

The square root of 317147231 is about 17808.6279931948. The cubic root of 317147231 is about 681.9517392027.

Adding to 317147231 its reverse (132741713), we get a palindrome (449888944).

The spelling of 317147231 in words is "three hundred seventeen million, one hundred forty-seven thousand, two hundred thirty-one".