405300221 has 2 divisors, whose sum is σ = 405300222. Its totient is φ = 405300220.

The previous prime is 405300199. The next prime is 405300253. The reversal of 405300221 is 122003504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 203376121 + 201924100 = 14261^2 + 14210^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-405300221 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 405300221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405303221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202650110 + 202650111.

It is an arithmetic number, because the mean of its divisors is an integer number (202650111).

Almost surely, 2^405300221 is an apocalyptic number.

It is an amenable number.

405300221 is a deficient number, since it is larger than the sum of its proper divisors (1).

405300221 is an equidigital number, since it uses as much as digits as its factorization.

405300221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 405300221 is about 20132.0694664011. The cubic root of 405300221 is about 740.0463940964.

Adding to 405300221 its reverse (122003504), we get a palindrome (527303725).

The spelling of 405300221 in words is "four hundred five million, three hundred thousand, two hundred twenty-one".