320533 has 2 divisors, whose sum is σ = 320534. Its totient is φ = 320532.

The previous prime is 320521. The next prime is 320539. The reversal of 320533 is 335023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 232324 + 88209 = 482^2 + 297^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320533 is a prime.

320533 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160266 + 160267.

It is an arithmetic number, because the mean of its divisors is an integer number (160267).

2³²⁰⁵³³ is an apocalyptic number.

It is an amenable number.

320533 is a deficient number, since it is larger than the sum of its proper divisors (1).

320533 is an equidigital number, since it uses as much as digits as its factorization.

320533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 270, while the sum is 16.

The square root of 320533 is about 566.1563388323. The cubic root of 320533 is about 68.4369925179.

Adding to 320533 its reverse (335023), we get a palindrome (655556).

The spelling of 320533 in words is "three hundred twenty thousand, five hundred thirty-three".