3333221 has 2 divisors, whose sum is σ = 3333222. Its totient is φ = 3333220.

The previous prime is 3333217. The next prime is 3333233. The reversal of 3333221 is 1223333.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3276100 + 57121 = 1810^2 + 239^2 .

It is a cyclic number.

It is not a de Polignac number, because 3333221 - 2² = 3333217 is a prime.

It is a super-2 number, since 2×3333221² = 22220724469682, which contains 22 as substring.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 3333221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3333251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1666610 + 1666611.

It is an arithmetic number, because the mean of its divisors is an integer number (1666611).

Almost surely, 2^3333221 is an apocalyptic number.

It is an amenable number.

3333221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3333221 is an equidigital number, since it uses as much as digits as its factorization.

3333221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324, while the sum is 17.

The square root of 3333221 is about 1825.7110943411. The cubic root of 3333221 is about 149.3784801626.

Adding to 3333221 its reverse (1223333), we get a palindrome (4556554).

The spelling of 3333221 in words is "three million, three hundred thirty-three thousand, two hundred twenty-one".