33222213 has 6 divisors (see below), whose sum is σ = 47987654. Its totient is φ = 22148136.

The previous prime is 33222191. The next prime is 33222223. The reversal of 33222213 is 31222233.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 16916769 + 16305444 = 4113^2 + 4038^2 .

It is not a de Polignac number, because 33222213 - 2⁵ = 33222181 is a prime.

It is a super-2 number, since 2×33222213² = 2207430873234738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33222223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1845670 + ... + 1845687.

Almost surely, 2^33222213 is an apocalyptic number.

It is an amenable number.

33222213 is a deficient number, since it is larger than the sum of its proper divisors (14765441).

33222213 is a wasteful number, since it uses less digits than its factorization.

33222213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3691363 (or 3691360 counting only the distinct ones).

The product of its digits is 432, while the sum is 18.

The square root of 33222213 is about 5763.8713552611. The cubic root of 33222213 is about 321.4717784034.

Adding to 33222213 its reverse (31222233), we get a palindrome (64444446).

The spelling of 33222213 in words is "thirty-three million, two hundred twenty-two thousand, two hundred thirteen".