2221744 has 40 divisors (see below), whose sum is σ = 4999680. Its totient is φ = 936768.

The previous prime is 2221741. The next prime is 2221753. The reversal of 2221744 is 4471222.

It is a happy number.

It is a super-2 number, since 2×2221744² = 9872292803072, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (2221741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9177 + ... + 9415.

It is an arithmetic number, because the mean of its divisors is an integer number (124992).

2^2221744 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 2221744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2499840).

2221744 is an abundant number, since it is smaller than the sum of its proper divisors (2777936).

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

2221744 is a wasteful number, since it uses less digits than its factorization.

2221744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337 (or 331 counting only the distinct ones).

The product of its digits is 896, while the sum is 22.

The square root of 2221744 is about 1490.5515757598. The cubic root of 2221744 is about 130.4862264839.

Adding to 2221744 its reverse (4471222), we get a palindrome (6692966).

The spelling of 2221744 in words is "two million, two hundred twenty-one thousand, seven hundred forty-four".