321313305 has 8 divisors (see below), whose sum is σ = 514101312. Its totient is φ = 171367088.

The previous prime is 321313297. The next prime is 321313327. The reversal of 321313305 is 503313123.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 321313305 - 2³ = 321313297 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10710429 + ... + 10710458.

It is an arithmetic number, because the mean of its divisors is an integer number (64262664).

Almost surely, 2^321313305 is an apocalyptic number.

It is an amenable number.

321313305 is a deficient number, since it is larger than the sum of its proper divisors (192788007).

321313305 is a wasteful number, since it uses less digits than its factorization.

321313305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21420895.

The product of its (nonzero) digits is 810, while the sum is 21.

The square root of 321313305 is about 17925.2142246613. The cubic root of 321313305 is about 684.9248181469.

Adding to 321313305 its reverse (503313123), we get a palindrome (824626428).

The spelling of 321313305 in words is "three hundred twenty-one million, three hundred thirteen thousand, three hundred five".