440330213 has 2 divisors, whose sum is σ = 440330214. Its totient is φ = 440330212.

The previous prime is 440330173. The next prime is 440330227. The reversal of 440330213 is 312033044.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 422631364 + 17698849 = 20558^2 + 4207^2 .

It is a cyclic number.

It is not a de Polignac number, because 440330213 - 2²⁰ = 439281637 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (440332213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220165106 + 220165107.

It is an arithmetic number, because the mean of its divisors is an integer number (220165107).

Almost surely, 2^440330213 is an apocalyptic number.

It is an amenable number.

440330213 is a deficient number, since it is larger than the sum of its proper divisors (1).

440330213 is an equidigital number, since it uses as much as digits as its factorization.

440330213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 440330213 is about 20984.0466307145. The cubic root of 440330213 is about 760.7807149285.

Adding to 440330213 its reverse (312033044), we get a palindrome (752363257).

The spelling of 440330213 in words is "four hundred forty million, three hundred thirty thousand, two hundred thirteen".