3205221 has 4 divisors (see below), whose sum is σ = 4273632. Its totient is φ = 2136812.

The previous prime is 3205219. The next prime is 3205253. The reversal of 3205221 is 1225023.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1225023 = 3 ⋅408341.

It is a cyclic number.

It is not a de Polignac number, because 3205221 - 2¹ = 3205219 is a prime.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 3205221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3205261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 534201 + ... + 534206.

It is an arithmetic number, because the mean of its divisors is an integer number (1068408).

Almost surely, 2^3205221 is an apocalyptic number.

It is an amenable number.

3205221 is a deficient number, since it is larger than the sum of its proper divisors (1068411).

3205221 is a wasteful number, since it uses less digits than its factorization.

3205221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1068410.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 3205221 is about 1790.3131011083. The cubic root of 3205221 is about 147.4413594342.

The spelling of 3205221 in words is "three million, two hundred five thousand, two hundred twenty-one".