3568221 has 12 divisors (see below), whose sum is σ = 5181280. Its totient is φ = 2366280.

The previous prime is 3568217. The next prime is 3568231. The reversal of 3568221 is 1228653.

It is not a de Polignac number, because 3568221 - 2² = 3568217 is a prime.

It is a super-2 number, since 2×3568221² = 25464402209682, which contains 22 as substring.

It is a d-powerful number, because it can be written as 3¹³ + 5⁹ + 6² + 8⁴ + 2⁸ + 2¹⁴ + 1 .

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3568211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 960 + ... + 2838.

Almost surely, 2^3568221 is an apocalyptic number.

It is an amenable number.

3568221 is a deficient number, since it is larger than the sum of its proper divisors (1613059).

3568221 is a wasteful number, since it uses less digits than its factorization.

3568221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2096 (or 2093 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 3568221 is about 1888.9735307833. The cubic root of 3568221 is about 152.8095798431.

The spelling of 3568221 in words is "three million, five hundred sixty-eight thousand, two hundred twenty-one".