317325821 has 4 divisors (see below), whose sum is σ = 334027200. Its totient is φ = 300624444.

The previous prime is 317325781. The next prime is 317325823. The reversal of 317325821 is 128523713.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-317325821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (317325823) 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, 8350661 + ... + 8350698.

It is an arithmetic number, because the mean of its divisors is an integer number (83506800).

Almost surely, 2^317325821 is an apocalyptic number.

It is an amenable number.

317325821 is a deficient number, since it is larger than the sum of its proper divisors (16701379).

317325821 is a wasteful number, since it uses less digits than its factorization.

317325821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16701378.

The product of its digits is 10080, while the sum is 32.

The square root of 317325821 is about 17813.6414300951. The cubic root of 317325821 is about 682.0797206740.

The spelling of 317325821 in words is "three hundred seventeen million, three hundred twenty-five thousand, eight hundred twenty-one".