321340305 has 48 divisors (see below), whose sum is σ = 608650560. Its totient is φ = 143806080.

The previous prime is 321340303. The next prime is 321340309. The reversal of 321340305 is 503043123.

It is not a de Polignac number, because 321340305 - 2¹ = 321340303 is a prime.

It is not an unprimeable number, because it can be changed into a prime (321340303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16786 + ... + 30404.

It is an arithmetic number, because the mean of its divisors is an integer number (12680220).

Almost surely, 2^321340305 is an apocalyptic number.

It is an amenable number.

321340305 is a deficient number, since it is larger than the sum of its proper divisors (287310255).

321340305 is a wasteful number, since it uses less digits than its factorization.

321340305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13662 (or 13651 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 321340305 is about 17925.9673379151. The cubic root of 321340305 is about 684.9440023842.

Adding to 321340305 its reverse (503043123), we get a palindrome (824383428).

The spelling of 321340305 in words is "three hundred twenty-one million, three hundred forty thousand, three hundred five".