22218462 has 84 divisors (see below), whose sum is σ = 58313736. Its totient is φ = 6327720.

The previous prime is 22218419. The next prime is 22218509. The reversal of 22218462 is 26481222.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

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 41 ways as a sum of consecutive naturals, for example, 71287 + ... + 71597.

Almost surely, 2^22218462 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22218462, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29156868).

22218462 is an abundant number, since it is smaller than the sum of its proper divisors (36095274).

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

22218462 is an equidigital number, since it uses as much as digits as its factorization.

22218462 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345 (or 323 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

The square root of 22218462 is about 4713.6463592425. The cubic root of 22218462 is about 281.1283634015.

Adding to 22218462 its reverse (26481222), we get a palindrome (48699684).

The spelling of 22218462 in words is "twenty-two million, two hundred eighteen thousand, four hundred sixty-two".