320021411 has 4 divisors (see below), whose sum is σ = 320416824. Its totient is φ = 319626000.

The previous prime is 320021407. The next prime is 320021417. The reversal of 320021411 is 114120023.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 320021411 - 2² = 320021407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320021417) 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 3 ways as a sum of consecutive naturals, for example, 196490 + ... + 198111.

It is an arithmetic number, because the mean of its divisors is an integer number (80104206).

Almost surely, 2^320021411 is an apocalyptic number.

320021411 is a deficient number, since it is larger than the sum of its proper divisors (395413).

320021411 is an equidigital number, since it uses as much as digits as its factorization.

320021411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395412.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 320021411 is about 17889.1422656314. The cubic root of 320021411 is about 684.0056334534.

Adding to 320021411 its reverse (114120023), we get a palindrome (434141434).

The spelling of 320021411 in words is "three hundred twenty million, twenty-one thousand, four hundred eleven".