22152211 has 4 divisors (see below), whose sum is σ = 22515424. Its totient is φ = 21789000.

The previous prime is 22152209. The next prime is 22152223. The reversal of 22152211 is 11225122.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 22152211 - 2¹ = 22152209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22152281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181515 + ... + 181636.

It is an arithmetic number, because the mean of its divisors is an integer number (5628856).

Almost surely, 2^22152211 is an apocalyptic number.

22152211 is a deficient number, since it is larger than the sum of its proper divisors (363213).

22152211 is an equidigital number, since it uses as much as digits as its factorization.

22152211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363212.

The product of its digits is 80, while the sum is 16.

The square root of 22152211 is about 4706.6135384159. The cubic root of 22152211 is about 280.8486624037.

Adding to 22152211 its reverse (11225122), we get a palindrome (33377333).

The spelling of 22152211 in words is "twenty-two million, one hundred fifty-two thousand, two hundred eleven".