22200556 has 24 divisors (see below), whose sum is σ = 45436160. Its totient is φ = 9292752.

The previous prime is 22200551. The next prime is 22200601. The reversal of 22200556 is 65500222.

It is not an unprimeable number, because it can be changed into a prime (22200551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8016 + ... + 10423.

Almost surely, 2^22200556 is an apocalyptic number.

It is an amenable number.

22200556 is an abundant number, since it is smaller than the sum of its proper divisors (23235604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22200556 is a wasteful number, since it uses less digits than its factorization.

22200556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18493 (or 18491 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 22200556 is about 4711.7465976005. The cubic root of 22200556 is about 281.0528220587.

Adding to 22200556 its reverse (65500222), we get a palindrome (87700778).

The spelling of 22200556 in words is "twenty-two million, two hundred thousand, five hundred fifty-six".