33730321 has 2 divisors, whose sum is σ = 33730322. Its totient is φ = 33730320.

The previous prime is 33730303. The next prime is 33730343. The reversal of 33730321 is 12303733.

It is an a-pointer prime, because the next prime (33730343) can be obtained adding 33730321 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30958096 + 2772225 = 5564^2 + 1665^2 .

It is a cyclic number.

It is not a de Polignac number, because 33730321 - 2⁹ = 33729809 is a prime.

It is a super-2 number, since 2×33730321² = 2275469109526082, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33730292 and 33730301.

It is not a weakly prime, because it can be changed into another prime (33730381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16865160 + 16865161.

It is an arithmetic number, because the mean of its divisors is an integer number (16865161).

Almost surely, 2^33730321 is an apocalyptic number.

It is an amenable number.

33730321 is a deficient number, since it is larger than the sum of its proper divisors (1).

33730321 is an equidigital number, since it uses as much as digits as its factorization.

33730321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1134, while the sum is 22.

The square root of 33730321 is about 5807.7810736976. The cubic root of 33730321 is about 323.1023807444.

The spelling of 33730321 in words is "thirty-three million, seven hundred thirty thousand, three hundred twenty-one".