22221342 has 96 divisors (see below), whose sum is σ = 57788640. Its totient is φ = 6082560.

The previous prime is 22221319. The next prime is 22221343. The reversal of 22221342 is 24312222.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221343) 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 47 ways as a sum of consecutive naturals, for example, 229038 + ... + 229134.

It is an arithmetic number, because the mean of its divisors is an integer number (601965).

Almost surely, 2^22221342 is an apocalyptic number.

22221342 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 22221342, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28894320).

22221342 is an abundant number, since it is smaller than the sum of its proper divisors (35567298).

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

22221342 is a wasteful number, since it uses less digits than its factorization.

22221342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218 (or 215 counting only the distinct ones).

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

The square root of 22221342 is about 4713.9518453204. The cubic root of 22221342 is about 281.1405096774.

Adding to 22221342 its reverse (24312222), we get a palindrome (46533564).

The spelling of 22221342 in words is "twenty-two million, two hundred twenty-one thousand, three hundred forty-two".