2212212305 has 4 divisors (see below), whose sum is σ = 2654654772. Its totient is φ = 1769769840.

The previous prime is 2212212293. The next prime is 2212212311. The reversal of 2212212305 is 5032122122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1433076736 + 779135569 = 37856^2 + 27913^2 .

It is not a de Polignac number, because 2212212305 - 2²⁰ = 2211163729 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221221226 + ... + 221221235.

It is an arithmetic number, because the mean of its divisors is an integer number (663663693).

Almost surely, 2^2212212305 is an apocalyptic number.

It is an amenable number.

2212212305 is a deficient number, since it is larger than the sum of its proper divisors (442442467).

2212212305 is an equidigital number, since it uses as much as digits as its factorization.

2212212305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442442466.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 2212212305 is about 47034.1610427995. The cubic root of 2212212305 is about 1302.9935559767.

Adding to 2212212305 its reverse (5032122122), we get a palindrome (7244334427).

The spelling of 2212212305 in words is "two billion, two hundred twelve million, two hundred twelve thousand, three hundred five".