33030221 has 8 divisors (see below), whose sum is σ = 38966784. Its totient is φ = 27398160.

The previous prime is 33030199. The next prime is 33030253. The reversal of 33030221 is 12203033.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33030221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33030196 and 33030205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33030271) 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, 75890 + ... + 76323.

It is an arithmetic number, because the mean of its divisors is an integer number (4870848).

Almost surely, 2^33030221 is an apocalyptic number.

33030221 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

33030221 is a deficient number, since it is larger than the sum of its proper divisors (5936563).

33030221 is a wasteful number, since it uses less digits than its factorization.

33030221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152251.

The product of its (nonzero) digits is 108, while the sum is 14.

The square root of 33030221 is about 5747.1924450117. The cubic root of 33030221 is about 320.8513171606.

Adding to 33030221 its reverse (12203033), we get a palindrome (45233254).

The spelling of 33030221 in words is "thirty-three million, thirty thousand, two hundred twenty-one".