22821100 has 18 divisors (see below), whose sum is σ = 49522004. Its totient is φ = 9128400.

The previous prime is 22821091. The next prime is 22821107. The reversal of 22821100 is 112822.

It is not an unprimeable number, because it can be changed into a prime (22821107) by changing a digit.

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 in 5 ways as a sum of consecutive naturals, for example, 114006 + ... + 114205.

Almost surely, 2^22821100 is an apocalyptic number.

22821100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22821100 is an abundant number, since it is smaller than the sum of its proper divisors (26700904).

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

22821100 is a wasteful number, since it uses less digits than its factorization.

22821100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228225 (or 228218 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 22821100 is about 4777.1434979494. The cubic root of 22821100 is about 283.6474332863.

Adding to 22821100 its reverse (112822), we get a palindrome (22933922).

The spelling of 22821100 in words is "twenty-two million, eight hundred twenty-one thousand, one hundred".