10221644 has 12 divisors (see below), whose sum is σ = 17967600. Its totient is φ = 5088048.

The previous prime is 10221623. The next prime is 10221647. The reversal of 10221644 is 44612201.

It is not an unprimeable number, because it can be changed into a prime (10221647) 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 3 ways as a sum of consecutive naturals, for example, 4664 + ... + 6495.

It is an arithmetic number, because the mean of its divisors is an integer number (1497300).

Almost surely, 2^10221644 is an apocalyptic number.

It is an amenable number.

10221644 is a deficient number, since it is larger than the sum of its proper divisors (7745956).

10221644 is a wasteful number, since it uses less digits than its factorization.

10221644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11392 (or 11390 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 10221644 is about 3197.1305885121. The cubic root of 10221644 is about 217.0235769013.

Adding to 10221644 its reverse (44612201), we get a palindrome (54833845).

The spelling of 10221644 in words is "ten million, two hundred twenty-one thousand, six hundred forty-four".