320811133 has 2 divisors, whose sum is σ = 320811134. Its totient is φ = 320811132.

The previous prime is 320811083. The next prime is 320811163. The reversal of 320811133 is 331118023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 169078009 + 151733124 = 13003^2 + 12318^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320811133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320811163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160405566 + 160405567.

It is an arithmetic number, because the mean of its divisors is an integer number (160405567).

Almost surely, 2^320811133 is an apocalyptic number.

It is an amenable number.

320811133 is a deficient number, since it is larger than the sum of its proper divisors (1).

320811133 is an equidigital number, since it uses as much as digits as its factorization.

320811133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 320811133 is about 17911.2013276609. The cubic root of 320811133 is about 684.5678151847.

Adding to 320811133 its reverse (331118023), we get a palindrome (651929156).

It can be divided in two parts, 3208 and 11133, that added together give a palindrome (14341).

The spelling of 320811133 in words is "three hundred twenty million, eight hundred eleven thousand, one hundred thirty-three".