321030313 has 2 divisors, whose sum is σ = 321030314. Its totient is φ = 321030312.

The previous prime is 321030271. The next prime is 321030331. The reversal of 321030313 is 313030123.

Together with next prime (321030331) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 320660649 + 369664 = 17907^2 + 608^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321030313 is a prime.

It is not a weakly prime, because it can be changed into another prime (321030383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160515156 + 160515157.

It is an arithmetic number, because the mean of its divisors is an integer number (160515157).

Almost surely, 2^321030313 is an apocalyptic number.

It is an amenable number.

321030313 is a deficient number, since it is larger than the sum of its proper divisors (1).

321030313 is an equidigital number, since it uses as much as digits as its factorization.

321030313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 16.

The square root of 321030313 is about 17917.3188005349. The cubic root of 321030313 is about 684.7236799091.

Adding to 321030313 its reverse (313030123), we get a palindrome (634060436).

The spelling of 321030313 in words is "three hundred twenty-one million, thirty thousand, three hundred thirteen".