33245021 has 2 divisors, whose sum is σ = 33245022. Its totient is φ = 33245020.

The previous prime is 33245011. The next prime is 33245057. The reversal of 33245021 is 12054233.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29822521 + 3422500 = 5461^2 + 1850^2 .

It is a cyclic number.

It is not a de Polignac number, because 33245021 - 2⁶ = 33244957 is a prime.

It is a super-2 number, since 2×33245021² = 2210462842580882, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 33244984 and 33245002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33245011) 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, 16622510 + 16622511.

It is an arithmetic number, because the mean of its divisors is an integer number (16622511).

Almost surely, 2^33245021 is an apocalyptic number.

It is an amenable number.

33245021 is a deficient number, since it is larger than the sum of its proper divisors (1).

33245021 is an equidigital number, since it uses as much as digits as its factorization.

33245021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 33245021 is about 5765.8495471179. The cubic root of 33245021 is about 321.5453281000.

Adding to 33245021 its reverse (12054233), we get a palindrome (45299254).

The spelling of 33245021 in words is "thirty-three million, two hundred forty-five thousand, twenty-one".