33033421 has 2 divisors, whose sum is σ = 33033422. Its totient is φ = 33033420.

The previous prime is 33033409. The next prime is 33033443. The reversal of 33033421 is 12433033.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27562500 + 5470921 = 5250^2 + 2339^2 .

It is a cyclic number.

It is not a de Polignac number, because 33033421 - 2¹¹ = 33031373 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33033461) 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, 16516710 + 16516711.

It is an arithmetic number, because the mean of its divisors is an integer number (16516711).

Almost surely, 2^33033421 is an apocalyptic number.

It is an amenable number.

33033421 is a deficient number, since it is larger than the sum of its proper divisors (1).

33033421 is an equidigital number, since it uses as much as digits as its factorization.

33033421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 19.

The square root of 33033421 is about 5747.4708350717. The cubic root of 33033421 is about 320.8616782888.

Adding to 33033421 its reverse (12433033), we get a palindrome (45466454).

It can be divided in two parts, 3303 and 3421, that added together give a square (6724 = 82²).

The spelling of 33033421 in words is "thirty-three million, thirty-three thousand, four hundred twenty-one".