22505222 has 4 divisors (see below), whose sum is σ = 33757836. Its totient is φ = 11252610.

The previous prime is 22505207. The next prime is 22505239. The reversal of 22505222 is 22250522.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 22505194 and 22505203.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5626304 + ... + 5626307.

It is an arithmetic number, because the mean of its divisors is an integer number (8439459).

Almost surely, 2^22505222 is an apocalyptic number.

22505222 is a deficient number, since it is larger than the sum of its proper divisors (11252614).

22505222 is a wasteful number, since it uses less digits than its factorization.

22505222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11252613.

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 22505222 is about 4743.9669054495. The cubic root of 22505222 is about 282.3326473755.

Adding to 22505222 its reverse (22250522), we get a palindrome (44755744).

The spelling of 22505222 in words is "twenty-two million, five hundred five thousand, two hundred twenty-two".