2743221 has 16 divisors (see below), whose sum is σ = 4067840. Its totient is φ = 1632960.

The previous prime is 2743219. The next prime is 2743229. The reversal of 2743221 is 1223472.

It is not a de Polignac number, because 2743221 - 2¹ = 2743219 is a prime.

It is a super-2 number, since 2×2743221² = 15050522909682, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2⁵ + 7⁶ + 4⁶ + 3 + 2¹⁹ + 2²¹ + 1 .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2743229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75 + ... + 2343.

It is an arithmetic number, because the mean of its divisors is an integer number (254240).

2^2743221 is an apocalyptic number.

It is an amenable number.

2743221 is a deficient number, since it is larger than the sum of its proper divisors (1324619).

2743221 is a wasteful number, since it uses less digits than its factorization.

2743221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2316.

The product of its digits is 672, while the sum is 21.

The square root of 2743221 is about 1656.2671885901. The cubic root of 2743221 is about 139.9867504468.

Adding to 2743221 its reverse (1223472), we get a palindrome (3966693).

The spelling of 2743221 in words is "two million, seven hundred forty-three thousand, two hundred twenty-one".