3228561 has 18 divisors (see below), whose sum is σ = 5425602. Its totient is φ = 1844640.

The previous prime is 3228559. The next prime is 3228581. The reversal of 3228561 is 1658223.

It can be written as a sum of positive squares in only one way, i.e., 1640961 + 1587600 = 1281^2 + 1260^2 .

It is not a de Polignac number, because 3228561 - 2¹ = 3228559 is a prime.

It is a super-2 number, since 2×3228561² = 20847212261442, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3228581) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3220 + ... + 4101.

Almost surely, 2^3228561 is an apocalyptic number.

It is an amenable number.

3228561 is a deficient number, since it is larger than the sum of its proper divisors (2197041).

3228561 is a wasteful number, since it uses less digits than its factorization.

3228561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7341 (or 7331 counting only the distinct ones).

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

The square root of 3228561 is about 1796.8196904531. The cubic root of 3228561 is about 147.7983771428.

The spelling of 3228561 in words is "three million, two hundred twenty-eight thousand, five hundred sixty-one".