445210217 has 2 divisors, whose sum is σ = 445210218. Its totient is φ = 445210216.

The previous prime is 445210177. The next prime is 445210219. The reversal of 445210217 is 712012544.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 441462121 + 3748096 = 21011^2 + 1936^2 .

It is a cyclic number.

It is not a de Polignac number, because 445210217 - 2⁶ = 445210153 is a prime.

Together with 445210219, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (445210219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222605108 + 222605109.

It is an arithmetic number, because the mean of its divisors is an integer number (222605109).

Almost surely, 2^445210217 is an apocalyptic number.

It is an amenable number.

445210217 is a deficient number, since it is larger than the sum of its proper divisors (1).

445210217 is an equidigital number, since it uses as much as digits as its factorization.

445210217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 445210217 is about 21100.0051421795. The cubic root of 445210217 is about 763.5808722591.

The spelling of 445210217 in words is "four hundred forty-five million, two hundred ten thousand, two hundred seventeen".