33023221 has 8 divisors (see below), whose sum is σ = 41171904. Its totient is φ = 25732320.

The previous prime is 33023213. The next prime is 33023227. The reversal of 33023221 is 12232033.

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 33023221 - 2³ = 33023213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33023195 and 33023204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33023227) 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, 214360 + ... + 214513.

It is an arithmetic number, because the mean of its divisors is an integer number (5146488).

Almost surely, 2^33023221 is an apocalyptic number.

It is an amenable number.

33023221 is a deficient number, since it is larger than the sum of its proper divisors (8148683).

33023221 is a wasteful number, since it uses less digits than its factorization.

33023221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428891.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 33023221 is about 5746.5834197373. The cubic root of 33023221 is about 320.8286498595.

Adding to 33023221 its reverse (12232033), we get a palindrome (45255254).

The spelling of 33023221 in words is "thirty-three million, twenty-three thousand, two hundred twenty-one".