316283021 has 4 divisors (see below), whose sum is σ = 316537500. Its totient is φ = 316028544.

The previous prime is 316282997. The next prime is 316283041. The reversal of 316283021 is 120382613.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 241460521 + 74822500 = 15539^2 + 8650^2 .

It is a cyclic number.

It is not a de Polignac number, because 316283021 - 2¹⁴ = 316266637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (316283041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125366 + ... + 127863.

It is an arithmetic number, because the mean of its divisors is an integer number (79134375).

Almost surely, 2^316283021 is an apocalyptic number.

It is an amenable number.

316283021 is a deficient number, since it is larger than the sum of its proper divisors (254479).

316283021 is a wasteful number, since it uses less digits than its factorization.

316283021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254478.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 316283021 is about 17784.3476405518. The cubic root of 316283021 is about 681.3317478312.

The spelling of 316283021 in words is "three hundred sixteen million, two hundred eighty-three thousand, twenty-one".