321013313 has 4 divisors (see below), whose sum is σ = 328842948. Its totient is φ = 313183680.

The previous prime is 321013309. The next prime is 321013327. The reversal of 321013313 is 313310123.

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 6589489 + 314423824 = 2567^2 + 17732^2 .

It is a cyclic number.

It is not a de Polignac number, because 321013313 - 2² = 321013309 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321013291 and 321013300.

It is not an unprimeable number, because it can be changed into a prime (321013333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3914756 + ... + 3914837.

It is an arithmetic number, because the mean of its divisors is an integer number (82210737).

Almost surely, 2^321013313 is an apocalyptic number.

It is an amenable number.

321013313 is a deficient number, since it is larger than the sum of its proper divisors (7829635).

321013313 is an equidigital number, since it uses as much as digits as its factorization.

321013313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7829634.

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 321013313 is about 17916.8443929170. The cubic root of 321013313 is about 684.7115932956.

Adding to 321013313 its reverse (313310123), we get a palindrome (634323436).

The spelling of 321013313 in words is "three hundred twenty-one million, thirteen thousand, three hundred thirteen".