3287221 has 16 divisors (see below), whose sum is σ = 3925504. Its totient is φ = 2694384.

The previous prime is 3287189. The next prime is 3287261. The reversal of 3287221 is 1227823.

3287221 = 259² + 260² + ... + 300².

It is not a de Polignac number, because 3287221 - 2⁵ = 3287189 is a prime.

It is a d-powerful number, because it can be written as 3⁹ + 2¹² + 8² + 7⁶ + 2²⁰ + 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 (3287261) 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, 20086 + ... + 20248.

It is an arithmetic number, because the mean of its divisors is an integer number (245344).

Almost surely, 2^3287221 is an apocalyptic number.

It is an amenable number.

3287221 is a deficient number, since it is larger than the sum of its proper divisors (638283).

3287221 is a wasteful number, since it uses less digits than its factorization.

3287221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280.

The product of its digits is 1344, while the sum is 25.

The square root of 3287221 is about 1813.0694967375. The cubic root of 3287221 is about 148.6881304739.

The spelling of 3287221 in words is "three million, two hundred eighty-seven thousand, two hundred twenty-one".