22212305 has 8 divisors (see below), whose sum is σ = 26688744. Its totient is φ = 17747200.

The previous prime is 22212301. The next prime is 22212329. The reversal of 22212305 is 50321222.

It can be written as a sum of positive squares in 4 ways, for example, as 3411409 + 18800896 = 1847^2 + 4336^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22212305 - 2² = 22212301 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22212301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2345 + ... + 7065.

It is an arithmetic number, because the mean of its divisors is an integer number (3336093).

Almost surely, 2^22212305 is an apocalyptic number.

It is an amenable number.

22212305 is a deficient number, since it is larger than the sum of its proper divisors (4476439).

22212305 is an equidigital number, since it uses as much as digits as its factorization.

22212305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5667.

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

The square root of 22212305 is about 4712.9932102646. The cubic root of 22212305 is about 281.1023929984.

Adding to 22212305 its reverse (50321222), we get a palindrome (72533527).

The spelling of 22212305 in words is "twenty-two million, two hundred twelve thousand, three hundred five".