320426221 has 2 divisors, whose sum is σ = 320426222. Its totient is φ = 320426220.

The previous prime is 320426209. The next prime is 320426233. The reversal of 320426221 is 122624023.

It is a balanced prime because it is at equal distance from previous prime (320426209) and next prime (320426233).

It can be written as a sum of positive squares in only one way, i.e., 291384900 + 29041321 = 17070^2 + 5389^2 .

It is an emirp because it is prime and its reverse (122624023) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 320426221 - 2¹³ = 320418029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 320426192 and 320426201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320426321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160213110 + 160213111.

It is an arithmetic number, because the mean of its divisors is an integer number (160213111).

Almost surely, 2^320426221 is an apocalyptic number.

It is an amenable number.

320426221 is a deficient number, since it is larger than the sum of its proper divisors (1).

320426221 is an equidigital number, since it uses as much as digits as its factorization.

320426221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 320426221 is about 17900.4530948242. The cubic root of 320426221 is about 684.2939221341.

The spelling of 320426221 in words is "three hundred twenty million, four hundred twenty-six thousand, two hundred twenty-one".