320132221 has 2 divisors, whose sum is σ = 320132222. Its totient is φ = 320132220.

The previous prime is 320132213. The next prime is 320132233. The reversal of 320132221 is 122231023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 187306596 + 132825625 = 13686^2 + 11525^2 .

It is a cyclic number.

It is not a de Polignac number, because 320132221 - 2³ = 320132213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 320132195 and 320132204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320132261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160066110 + 160066111.

It is an arithmetic number, because the mean of its divisors is an integer number (160066111).

Almost surely, 2^320132221 is an apocalyptic number.

It is an amenable number.

320132221 is a deficient number, since it is larger than the sum of its proper divisors (1).

320132221 is an equidigital number, since it uses as much as digits as its factorization.

320132221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 320132221 is about 17892.2391276218. The cubic root of 320132221 is about 684.0845718360.

Adding to 320132221 its reverse (122231023), we get a palindrome (442363244).

The spelling of 320132221 in words is "three hundred twenty million, one hundred thirty-two thousand, two hundred twenty-one".