22221819 has 12 divisors (see below), whose sum is σ = 32643000. Its totient is φ = 14563104.

The previous prime is 22221817. The next prime is 22221833. The reversal of 22221819 is 91812222.

It is not a de Polignac number, because 22221819 - 2¹ = 22221817 is a prime.

It is a super-3 number, since 3×22221819³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 22221792 and 22221801.

It is not an unprimeable number, because it can be changed into a prime (22221817) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20394 + ... + 21455.

It is an arithmetic number, because the mean of its divisors is an integer number (2720250).

Almost surely, 2^22221819 is an apocalyptic number.

22221819 is a deficient number, since it is larger than the sum of its proper divisors (10421181).

22221819 is a wasteful number, since it uses less digits than its factorization.

22221819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41914 (or 41911 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 22221819 is about 4714.0024395412. The cubic root of 22221819 is about 281.1425213030.

It can be divided in two parts, 22 and 221819, that added together give a square (221841 = 471²).

The spelling of 22221819 in words is "twenty-two million, two hundred twenty-one thousand, eight hundred nineteen".