33212209 has 8 divisors (see below), whose sum is σ = 35072480. Its totient is φ = 31363200.

The previous prime is 33212189. The next prime is 33212261. The reversal of 33212209 is 90221233.

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

It is a cyclic number.

It is not a de Polignac number, because 33212209 - 2⁹ = 33211697 is a prime.

It is a super-2 number, since 2×33212209² = 2206101653319362, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 33212209.

It is not an unprimeable number, because it can be changed into a prime (33012209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3649 + ... + 8929.

It is an arithmetic number, because the mean of its divisors is an integer number (4384060).

Almost surely, 2^33212209 is an apocalyptic number.

It is an amenable number.

33212209 is a deficient number, since it is larger than the sum of its proper divisors (1860271).

33212209 is a wasteful number, since it uses less digits than its factorization.

33212209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5631.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 33212209 is about 5763.0034704137. The cubic root of 33212209 is about 321.4395075597.

The spelling of 33212209 in words is "thirty-three million, two hundred twelve thousand, two hundred nine".