22213422 has 144 divisors (see below), whose sum is σ = 63737856. Its totient is φ = 5464800.

The previous prime is 22213417. The next prime is 22213439. The reversal of 22213422 is 22431222.

It is a super-2 number, since 2×22213422² = 986872233900168, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 22213395 and 22213404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 472603 + ... + 472649.

It is an arithmetic number, because the mean of its divisors is an integer number (442624).

Almost surely, 2^22213422 is an apocalyptic number.

22213422 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 22213422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31868928).

22213422 is an abundant number, since it is smaller than the sum of its proper divisors (41524434).

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

22213422 is a wasteful number, since it uses less digits than its factorization.

22213422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115 (or 101 counting only the distinct ones).

The product of its digits is 384, while the sum is 18.

The square root of 22213422 is about 4713.1117109612. Note that the first 3 decimals coincide. The cubic root of 22213422 is about 281.1071048928.

Adding to 22213422 its reverse (22431222), we get a palindrome (44644644).

It can be divided in two parts, 22 and 213422, that added together give a square (213444 = 462²).

The spelling of 22213422 in words is "twenty-two million, two hundred thirteen thousand, four hundred twenty-two".