317123261 has 24 divisors (see below), whose sum is σ = 398407104. Its totient is φ = 247104000.

The previous prime is 317123251. The next prime is 317123297. The reversal of 317123261 is 162321713.

It is a de Polignac number, because none of the positive numbers 2^k-317123261 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 317123261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (317123251) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 77261 + ... + 81261.

It is an arithmetic number, because the mean of its divisors is an integer number (16600296).

Almost surely, 2^317123261 is an apocalyptic number.

It is an amenable number.

317123261 is a deficient number, since it is larger than the sum of its proper divisors (81283843).

317123261 is a wasteful number, since it uses less digits than its factorization.

317123261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4101 (or 4088 counting only the distinct ones).

The product of its digits is 1512, while the sum is 26.

The square root of 317123261 is about 17807.9549920815. The cubic root of 317123261 is about 681.9345581236.

Adding to 317123261 its reverse (162321713), we get a palindrome (479444974).

The spelling of 317123261 in words is "three hundred seventeen million, one hundred twenty-three thousand, two hundred sixty-one".