3440221 has 4 divisors (see below), whose sum is σ = 3455872. Its totient is φ = 3424572.

The previous prime is 3440209. The next prime is 3440237. The reversal of 3440221 is 1220443.

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.

It is a cyclic number.

It is not a de Polignac number, because 3440221 - 2⁵ = 3440189 is a prime.

It is a Duffinian number.

3440221 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3440195 and 3440204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3440291) 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, 7491 + ... + 7936.

It is an arithmetic number, because the mean of its divisors is an integer number (863968).

Almost surely, 2^3440221 is an apocalyptic number.

It is an amenable number.

3440221 is a deficient number, since it is larger than the sum of its proper divisors (15651).

3440221 is a wasteful number, since it uses less digits than its factorization.

3440221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15650.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 3440221 is about 1854.7832757495. The cubic root of 3440221 is about 150.9600789164.

Adding to 3440221 its reverse (1220443), we get a palindrome (4660664).

The spelling of 3440221 in words is "three million, four hundred forty thousand, two hundred twenty-one".