2221568 has 20 divisors (see below), whose sum is σ = 4439820. Its totient is φ = 1110528.

The previous prime is 2221567. The next prime is 2221589. The reversal of 2221568 is 8651222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1658 + ... + 2681.

It is an arithmetic number, because the mean of its divisors is an integer number (221991).

2^2221568 is an apocalyptic number.

It is an amenable number.

2221568 is a deficient number, since it is larger than the sum of its proper divisors (2218252).

2221568 is an frugal number, since it uses more digits than its factorization.

2221568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4357 (or 4341 counting only the distinct ones).

The product of its digits is 1920, while the sum is 26.

The square root of 2221568 is about 1490.4925360430. The cubic root of 2221568 is about 130.4827808150.

The spelling of 2221568 in words is "two million, two hundred twenty-one thousand, five hundred sixty-eight".