320641133 has 2 divisors, whose sum is σ = 320641134. Its totient is φ = 320641132.

The previous prime is 320641127. The next prime is 320641147. The reversal of 320641133 is 331146023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 307406089 + 13235044 = 17533^2 + 3638^2 .

It is a cyclic number.

It is not a de Polignac number, because 320641133 - 2⁸ = 320640877 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 320641099 and 320641108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320641333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160320566 + 160320567.

It is an arithmetic number, because the mean of its divisors is an integer number (160320567).

Almost surely, 2^320641133 is an apocalyptic number.

It is an amenable number.

320641133 is a deficient number, since it is larger than the sum of its proper divisors (1).

320641133 is an equidigital number, since it uses as much as digits as its factorization.

320641133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 320641133 is about 17906.4550651434. The cubic root of 320641133 is about 684.4468747737.

Adding to 320641133 its reverse (331146023), we get a palindrome (651787156).

The spelling of 320641133 in words is "three hundred twenty million, six hundred forty-one thousand, one hundred thirty-three".