22100556 has 12 divisors (see below), whose sum is σ = 51567992. Its totient is φ = 7366848.

The previous prime is 22100537. The next prime is 22100557. The reversal of 22100556 is 65500122.

22100556 is nontrivially palindromic in base 14.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (22100557) 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 3 ways as a sum of consecutive naturals, for example, 920845 + ... + 920868.

Almost surely, 2^22100556 is an apocalyptic number.

It is an amenable number.

22100556 is an abundant number, since it is smaller than the sum of its proper divisors (29467436).

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

22100556 is a wasteful number, since it uses less digits than its factorization.

22100556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1841720 (or 1841718 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 22100556 is about 4701.1228445979. The cubic root of 22100556 is about 280.6301961991.

Adding to 22100556 its reverse (65500122), we get a palindrome (87600678).

The spelling of 22100556 in words is "twenty-two million, one hundred thousand, five hundred fifty-six".