33212109 has 16 divisors (see below), whose sum is σ = 50691200. Its totient is φ = 18947520.

The previous prime is 33212093. The next prime is 33212111. The reversal of 33212109 is 90121233.

It is a happy number.

It is not a de Polignac number, because 33212109 - 2⁴ = 33212093 is a prime.

It is a super-2 number, since 2×33212109² = 2206088368455762, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33212119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20667 + ... + 22215.

It is an arithmetic number, because the mean of its divisors is an integer number (3168200).

Almost surely, 2^33212109 is an apocalyptic number.

It is an amenable number.

33212109 is a deficient number, since it is larger than the sum of its proper divisors (17479091).

33212109 is a wasteful number, since it uses less digits than its factorization.

33212109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2580.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 33212109 is about 5762.9947943756. The cubic root of 33212109 is about 321.4391849476.

The spelling of 33212109 in words is "thirty-three million, two hundred twelve thousand, one hundred nine".