3331221 has 8 divisors (see below), whose sum is σ = 4561824. Its totient is φ = 2160720.

The previous prime is 3331217. The next prime is 3331247. The reversal of 3331221 is 1221333.

3331221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3331221 - 2² = 3331217 is a prime.

It is a super-2 number, since 2×3331221² = 22194066701682, which contains 22 as substring.

3331221 is a modest number, since divided by 1221 gives 333 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 3331221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3331621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14895 + ... + 15116.

It is an arithmetic number, because the mean of its divisors is an integer number (570228).

Almost surely, 2^3331221 is an apocalyptic number.

It is an amenable number.

3331221 is a deficient number, since it is larger than the sum of its proper divisors (1230603).

3331221 is a wasteful number, since it uses less digits than its factorization.

3331221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30051.

The product of its digits is 108, while the sum is 15.

The square root of 3331221 is about 1825.1632803670. The cubic root of 3331221 is about 149.3485974822.

Adding to 3331221 its reverse (1221333), we get a palindrome (4552554).

It can be divided in two parts, 33312 and 21, that added together give a palindrome (33333).

The spelling of 3331221 in words is "three million, three hundred thirty-one thousand, two hundred twenty-one".