33021253 has 2 divisors, whose sum is σ = 33021254. Its totient is φ = 33021252.

The previous prime is 33021251. The next prime is 33021271. The reversal of 33021253 is 35212033.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32982049 + 39204 = 5743^2 + 198^2 .

It is a cyclic number.

It is not a de Polignac number, because 33021253 - 2¹ = 33021251 is a prime.

Together with 33021251, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 33021253.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33021251) 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 as a sum of consecutive naturals, namely, 16510626 + 16510627.

It is an arithmetic number, because the mean of its divisors is an integer number (16510627).

Almost surely, 2^33021253 is an apocalyptic number.

It is an amenable number.

33021253 is a deficient number, since it is larger than the sum of its proper divisors (1).

33021253 is an equidigital number, since it uses as much as digits as its factorization.

33021253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 19.

The square root of 33021253 is about 5746.4121850073. The cubic root of 33021253 is about 320.8222765328.

Adding to 33021253 its reverse (35212033), we get a palindrome (68233286).

The spelling of 33021253 in words is "thirty-three million, twenty-one thousand, two hundred fifty-three".