321133217 has 2 divisors, whose sum is σ = 321133218. Its totient is φ = 321133216.

The previous prime is 321133181. The next prime is 321133289. The reversal of 321133217 is 712331123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 214300321 + 106832896 = 14639^2 + 10336^2 .

It is a cyclic number.

It is not a de Polignac number, because 321133217 - 2⁸ = 321132961 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 321133192 and 321133201.

It is not a weakly prime, because it can be changed into another prime (321133717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160566608 + 160566609.

It is an arithmetic number, because the mean of its divisors is an integer number (160566609).

Almost surely, 2^321133217 is an apocalyptic number.

It is an amenable number.

321133217 is a deficient number, since it is larger than the sum of its proper divisors (1).

321133217 is an equidigital number, since it uses as much as digits as its factorization.

321133217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 756, while the sum is 23.

The square root of 321133217 is about 17920.1902054638. The cubic root of 321133217 is about 684.7968332070.

The spelling of 321133217 in words is "three hundred twenty-one million, one hundred thirty-three thousand, two hundred seventeen".