33221219 has 4 divisors (see below), whose sum is σ = 33334896. Its totient is φ = 33107544.

The previous prime is 33221197. The next prime is 33221249. The reversal of 33221219 is 91212233.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91212233 = 7 ⋅13030319.

It is a cyclic number.

It is not a de Polignac number, because 33221219 - 2²⁴ = 16444003 is a prime.

It is a super-2 number, since 2×33221219² = 2207298783691922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33221194 and 33221203.

It is not an unprimeable number, because it can be changed into a prime (33221249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56399 + ... + 56984.

It is an arithmetic number, because the mean of its divisors is an integer number (8333724).

Almost surely, 2^33221219 is an apocalyptic number.

33221219 is a deficient number, since it is larger than the sum of its proper divisors (113677).

33221219 is a wasteful number, since it uses less digits than its factorization.

33221219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113676.

The product of its digits is 648, while the sum is 23.

The square root of 33221219 is about 5763.7851278478. The cubic root of 33221219 is about 321.4685722540.

The spelling of 33221219 in words is "thirty-three million, two hundred twenty-one thousand, two hundred nineteen".