22212265 has 4 divisors (see below), whose sum is σ = 26654724. Its totient is φ = 17769808.

The previous prime is 22212257. The next prime is 22212271. The reversal of 22212265 is 56221222.

It is a happy number.

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 4260096 + 17952169 = 2064^2 + 4237^2 .

It is a cyclic number.

It is not a de Polignac number, because 22212265 - 2³ = 22212257 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2221222 + ... + 2221231.

It is an arithmetic number, because the mean of its divisors is an integer number (6663681).

Almost surely, 2^22212265 is an apocalyptic number.

It is an amenable number.

22212265 is a deficient number, since it is larger than the sum of its proper divisors (4442459).

22212265 is an equidigital number, since it uses as much as digits as its factorization.

22212265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4442458.

The product of its digits is 960, while the sum is 22.

The square root of 22212265 is about 4712.9889666750. The cubic root of 22212265 is about 281.1022242616.

Adding to 22212265 its reverse (56221222), we get a palindrome (78433487).

The spelling of 22212265 in words is "twenty-two million, two hundred twelve thousand, two hundred sixty-five".