33022021 has 4 divisors (see below), whose sum is σ = 33645132. Its totient is φ = 32398912.

The previous prime is 33021983. The next prime is 33022049. The reversal of 33022021 is 12022033.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13793796 + 19228225 = 3714^2 + 4385^2 .

It is a cyclic number.

It is not a de Polignac number, because 33022021 - 2⁹ = 33021509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33021992 and 33022010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33022081) 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, 311476 + ... + 311581.

It is an arithmetic number, because the mean of its divisors is an integer number (8411283).

Almost surely, 2^33022021 is an apocalyptic number.

It is an amenable number.

33022021 is a deficient number, since it is larger than the sum of its proper divisors (623111).

33022021 is an equidigital number, since it uses as much as digits as its factorization.

33022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623110.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 33022021 is about 5746.4790089236. The cubic root of 33022021 is about 320.8247637148.

Adding to 33022021 its reverse (12022033), we get a palindrome (45044054).

The spelling of 33022021 in words is "thirty-three million, twenty-two thousand, twenty-one".