2221056 has 66 divisors (see below), whose sum is σ = 6439862. Its totient is φ = 737280.

The previous prime is 2221031. The next prime is 2221061. The reversal of 2221056 is 6501222.

It can be written as a sum of positive squares in only one way, i.e., 2073600 + 147456 = 1440^2 + 384^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9096 + ... + 9336.

2^2221056 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 2221056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3219931).

2221056 is an abundant number, since it is smaller than the sum of its proper divisors (4218806).

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

2221056 is a wasteful number, since it uses less digits than its factorization.

2221056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267 (or 246 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 2221056 is about 1490.3207708410. The cubic root of 2221056 is about 130.4727560162.

Adding to 2221056 its reverse (6501222), we get a palindrome (8722278).

It can be divided in two parts, 222105 and 6, that added together give a triangular number (222111 = T₆₆₆).

The spelling of 2221056 in words is "two million, two hundred twenty-one thousand, fifty-six".