320213311 has 10 divisors (see below), whose sum is σ = 352248560. Its totient is φ = 291089700.

The previous prime is 320213297. The next prime is 320213323. The reversal of 320213311 is 113312023.

It is a de Polignac number, because none of the positive numbers 2^k-320213311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320213351) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3706 + ... + 25576.

It is an arithmetic number, because the mean of its divisors is an integer number (35224856).

Almost surely, 2^320213311 is an apocalyptic number.

320213311 is a deficient number, since it is larger than the sum of its proper divisors (32035249).

320213311 is an frugal number, since it uses more digits than its factorization.

320213311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21915 (or 21882 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 320213311 is about 17894.5050504338. The cubic root of 320213311 is about 684.1423268626.

Adding to 320213311 its reverse (113312023), we get a palindrome (433525334).

The spelling of 320213311 in words is "three hundred twenty million, two hundred thirteen thousand, three hundred eleven".