33441021 has 6 divisors (see below), whose sum is σ = 48303710. Its totient is φ = 22294008.

The previous prime is 33441013. The next prime is 33441029. The reversal of 33441021 is 12014433.

It is an interprime number because it is at equal distance from previous prime (33441013) and next prime (33441029).

It can be written as a sum of positive squares in only one way, i.e., 29484900 + 3956121 = 5430^2 + 1989^2 .

It is not a de Polignac number, because 33441021 - 2³ = 33441013 is a prime.

It is a super-2 number, since 2×33441021² = 2236603771044882, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 33440985 and 33441003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33441029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1857826 + ... + 1857843.

Almost surely, 2^33441021 is an apocalyptic number.

It is an amenable number.

33441021 is a deficient number, since it is larger than the sum of its proper divisors (14862689).

33441021 is a wasteful number, since it uses less digits than its factorization.

33441021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3715675 (or 3715672 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 33441021 is about 5782.8211973050. The cubic root of 33441021 is about 322.1759933195.

Adding to 33441021 its reverse (12014433), we get a palindrome (45455454).

The spelling of 33441021 in words is "thirty-three million, four hundred forty-one thousand, twenty-one".