316300021 has 4 divisors (see below), whose sum is σ = 320632972. Its totient is φ = 311967072.

The previous prime is 316300001. The next prime is 316300027. The reversal of 316300021 is 120003613.

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 73719396 + 242580625 = 8586^2 + 15575^2 .

It is a cyclic number.

It is not a de Polignac number, because 316300021 - 2¹⁵ = 316267253 is a prime.

It is a super-3 number, since 3×316300021³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 316299968 and 316300004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (316300027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2166366 + ... + 2166511.

It is an arithmetic number, because the mean of its divisors is an integer number (80158243).

Almost surely, 2^316300021 is an apocalyptic number.

It is an amenable number.

316300021 is a deficient number, since it is larger than the sum of its proper divisors (4332951).

316300021 is an equidigital number, since it uses as much as digits as its factorization.

316300021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4332950.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 316300021 is about 17784.8255825015. The cubic root of 316300021 is about 681.3439546538.

Adding to 316300021 its reverse (120003613), we get a palindrome (436303634).

The spelling of 316300021 in words is "three hundred sixteen million, three hundred thousand, twenty-one".