33244021 has 2 divisors, whose sum is σ = 33244022. Its totient is φ = 33244020.

The previous prime is 33243983. The next prime is 33244033. The reversal of 33244021 is 12044233.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22752900 + 10491121 = 4770^2 + 3239^2 .

It is a cyclic number.

It is not a de Polignac number, because 33244021 - 2¹⁷ = 33112949 is a prime.

It is a super-2 number, since 2×33244021² = 2210329864496882, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 33244021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33244051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16622010 + 16622011.

It is an arithmetic number, because the mean of its divisors is an integer number (16622011).

Almost surely, 2^33244021 is an apocalyptic number.

It is an amenable number.

33244021 is a deficient number, since it is larger than the sum of its proper divisors (1).

33244021 is an equidigital number, since it uses as much as digits as its factorization.

33244021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 33244021 is about 5765.7628289759. The cubic root of 33244021 is about 321.5421040728.

Adding to 33244021 its reverse (12044233), we get a palindrome (45288254).

The spelling of 33244021 in words is "thirty-three million, two hundred forty-four thousand, twenty-one".