22208135 has 4 divisors (see below), whose sum is σ = 26649768. Its totient is φ = 17766504.

The previous prime is 22208129. The next prime is 22208189. The reversal of 22208135 is 53180222.

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 22208135 - 2⁶ = 22208071 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22208135.

It is a congruent 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, 2220809 + ... + 2220818.

It is an arithmetic number, because the mean of its divisors is an integer number (6662442).

Almost surely, 2^22208135 is an apocalyptic number.

22208135 is a deficient number, since it is larger than the sum of its proper divisors (4441633).

22208135 is an equidigital number, since it uses as much as digits as its factorization.

22208135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4441632.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 22208135 is about 4712.5507954822. The cubic root of 22208135 is about 281.0848010925.

Adding to 22208135 its reverse (53180222), we get a palindrome (75388357).

The spelling of 22208135 in words is "twenty-two million, two hundred eight thousand, one hundred thirty-five".