42221244 has 48 divisors (see below), whose sum is σ = 107321760. Its totient is φ = 12840960.

The previous prime is 42221243. The next prime is 42221269. The reversal of 42221244 is 44212224.

42221244 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 42221244.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42221243) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 12364 + ... + 15404.

It is an arithmetic number, because the mean of its divisors is an integer number (2235870).

Almost surely, 2^42221244 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42221244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53660880).

42221244 is an abundant number, since it is smaller than the sum of its proper divisors (65100516).

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

42221244 is a wasteful number, since it uses less digits than its factorization.

42221244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3150 (or 3148 counting only the distinct ones).

The product of its digits is 1024, while the sum is 21.

The square root of 42221244 is about 6497.7876234916. The cubic root of 42221244 is about 348.2119530589.

Adding to 42221244 its reverse (44212224), we get a palindrome (86433468).

The spelling of 42221244 in words is "forty-two million, two hundred twenty-one thousand, two hundred forty-four".