445244213 has 2 divisors, whose sum is σ = 445244214. Its totient is φ = 445244212.

The previous prime is 445244209. The next prime is 445244257. The reversal of 445244213 is 312442544.

445244213 is nontrivially palindromic in base 7.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 231587524 + 213656689 = 15218^2 + 14617^2 .

It is a cyclic number.

It is not a de Polignac number, because 445244213 - 2² = 445244209 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (445244713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222622106 + 222622107.

It is an arithmetic number, because the mean of its divisors is an integer number (222622107).

Almost surely, 2^445244213 is an apocalyptic number.

It is an amenable number.

445244213 is a deficient number, since it is larger than the sum of its proper divisors (1).

445244213 is an equidigital number, since it uses as much as digits as its factorization.

445244213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15360, while the sum is 29.

The square root of 445244213 is about 21100.8107190221. The cubic root of 445244213 is about 763.6003072987.

Adding to 445244213 its reverse (312442544), we get a palindrome (757686757).

The spelling of 445244213 in words is "four hundred forty-five million, two hundred forty-four thousand, two hundred thirteen".