22180422 has 32 divisors (see below), whose sum is σ = 48988800. Its totient is φ = 6638720.

The previous prime is 22180421. The next prime is 22180453. The reversal of 22180422 is 22408122.

It is a happy number.

It is a super-2 number, since 2×22180422² = 983942240196168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22180421) 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 15 ways as a sum of consecutive naturals, for example, 3454 + ... + 7502.

It is an arithmetic number, because the mean of its divisors is an integer number (1530900).

Almost surely, 2^22180422 is an apocalyptic number.

22180422 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 22180422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24494400).

22180422 is an abundant number, since it is smaller than the sum of its proper divisors (26808378).

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

22180422 is a wasteful number, since it uses less digits than its factorization.

22180422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4148.

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 22180422 is about 4709.6095379553. The cubic root of 22180422 is about 280.9678327603.

Adding to 22180422 its reverse (22408122), we get a palindrome (44588544).

The spelling of 22180422 in words is "twenty-two million, one hundred eighty thousand, four hundred twenty-two".