33640133 has 2 divisors, whose sum is σ = 33640134. Its totient is φ = 33640132.

The previous prime is 33640121. The next prime is 33640151. The reversal of 33640133 is 33104633.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29571844 + 4068289 = 5438^2 + 2017^2 .

It is a cyclic number.

It is not a de Polignac number, because 33640133 - 2⁶ = 33640069 is a prime.

It is a super-2 number, since 2×33640133² = 2263317096515378, 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 = 33640099 and 33640108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33640153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16820066 + 16820067.

It is an arithmetic number, because the mean of its divisors is an integer number (16820067).

Almost surely, 2^33640133 is an apocalyptic number.

It is an amenable number.

33640133 is a deficient number, since it is larger than the sum of its proper divisors (1).

33640133 is an equidigital number, since it uses as much as digits as its factorization.

33640133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 23.

The square root of 33640133 is about 5800.0114655059. The cubic root of 33640133 is about 322.8141537453.

Adding to 33640133 its reverse (33104633), we get a palindrome (66744766).

The spelling of 33640133 in words is "thirty-three million, six hundred forty thousand, one hundred thirty-three".