321313163 has 2 divisors, whose sum is σ = 321313164. Its totient is φ = 321313162.

The previous prime is 321313159. The next prime is 321313207. The reversal of 321313163 is 361313123.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (361313123) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 321313163 - 2² = 321313159 is a prime.

It is not a weakly prime, because it can be changed into another prime (321313133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160656581 + 160656582.

It is an arithmetic number, because the mean of its divisors is an integer number (160656582).

Almost surely, 2^321313163 is an apocalyptic number.

321313163 is a deficient number, since it is larger than the sum of its proper divisors (1).

321313163 is an equidigital number, since it uses as much as digits as its factorization.

321313163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 972, while the sum is 23.

The square root of 321313163 is about 17925.2102637598. The cubic root of 321313163 is about 684.9247172492.

Adding to 321313163 its reverse (361313123), we get a palindrome (682626286).

The spelling of 321313163 in words is "three hundred twenty-one million, three hundred thirteen thousand, one hundred sixty-three".