316521 has 16 divisors (see below), whose sum is σ = 494400. Its totient is φ = 199584.

The previous prime is 316507. The next prime is 316531. The reversal of 316521 is 125613.

316521 is nontrivially palindromic in base 7.

It is not a de Polignac number, because 316521 - 2¹⁴ = 300137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 316494 and 316503.

It is not an unprimeable number, because it can be changed into a prime (316501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 205 + ... + 821.

It is an arithmetic number, because the mean of its divisors is an integer number (30900).

2³¹⁶⁵²¹ is an apocalyptic number.

It is an amenable number.

316521 is a deficient number, since it is larger than the sum of its proper divisors (177879).

316521 is a wasteful number, since it uses less digits than its factorization.

316521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645 (or 639 counting only the distinct ones).

The product of its digits is 180, while the sum is 18.

The square root of 316521 is about 562.6019907537. The cubic root of 316521 is about 68.1502588489.

The spelling of 316521 in words is "three hundred sixteen thousand, five hundred twenty-one".