33440521 has 2 divisors, whose sum is σ = 33440522. Its totient is φ = 33440520.

The previous prime is 33440507. The next prime is 33440549. The reversal of 33440521 is 12504433.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29278921 + 4161600 = 5411^2 + 2040^2 .

It is a cyclic number.

It is not a de Polignac number, because 33440521 - 2⁹ = 33440009 is a prime.

It is a super-2 number, since 2×33440521² = 2236536889502882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33440492 and 33440501.

It is not a weakly prime, because it can be changed into another prime (33440021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16720260 + 16720261.

It is an arithmetic number, because the mean of its divisors is an integer number (16720261).

Almost surely, 2^33440521 is an apocalyptic number.

It is an amenable number.

33440521 is a deficient number, since it is larger than the sum of its proper divisors (1).

33440521 is an equidigital number, since it uses as much as digits as its factorization.

33440521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 33440521 is about 5782.7779656494. Note that the first 3 decimals coincide. The cubic root of 33440521 is about 322.1743876189.

Adding to 33440521 its reverse (12504433), we get a palindrome (45944954).

The spelling of 33440521 in words is "thirty-three million, four hundred forty thousand, five hundred twenty-one".