10221444 has 96 divisors (see below), whose sum is σ = 28385280. Its totient is φ = 3175200.

The previous prime is 10221443. The next prime is 10221457. The reversal of 10221444 is 44412201.

10221444 is a `hidden beast` number, since 1 + 0 + 221 + 444 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (10221443) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 143929 + ... + 143999.

It is an arithmetic number, because the mean of its divisors is an integer number (295680).

Almost surely, 2^10221444 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 10221444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14192640).

10221444 is an abundant number, since it is smaller than the sum of its proper divisors (18163836).

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

10221444 is a wasteful number, since it uses less digits than its factorization.

10221444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158 (or 150 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 10221444 is about 3197.0993103124. The cubic root of 10221444 is about 217.0221614408.

Adding to 10221444 its reverse (44412201), we get a palindrome (54633645).

The spelling of 10221444 in words is "ten million, two hundred twenty-one thousand, four hundred forty-four".