33442213 has 24 divisors (see below), whose sum is σ = 41417984. Its totient is φ = 26438400.

The previous prime is 33442193. The next prime is 33442217. The reversal of 33442213 is 31224433.

It is a happy number.

It is not a de Polignac number, because 33442213 - 2¹³ = 33434021 is a prime.

It is a super-2 number, since 2×33442213² = 2236763220674738, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33442217) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 123268 + ... + 123538.

Almost surely, 2^33442213 is an apocalyptic number.

It is an amenable number.

33442213 is a deficient number, since it is larger than the sum of its proper divisors (7975771).

33442213 is a wasteful number, since it uses less digits than its factorization.

33442213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373 (or 356 counting only the distinct ones).

The product of its digits is 1728, while the sum is 22.

The square root of 33442213 is about 5782.9242602683. The cubic root of 33442213 is about 322.1798212451.

Adding to 33442213 its reverse (31224433), we get a palindrome (64666646).

The spelling of 33442213 in words is "thirty-three million, four hundred forty-two thousand, two hundred thirteen".