33402881 has 2 divisors, whose sum is σ = 33402882. Its totient is φ = 33402880.

The previous prime is 33402871. The next prime is 33402907. The reversal of 33402881 is 18820433.

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., 32890225 + 512656 = 5735^2 + 716^2 .

It is an emirp because it is prime and its reverse (18820433) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33402881 is a prime.

It is a super-2 number, since 2×33402881² = 2231504918200322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (33402851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16701440 + 16701441.

It is an arithmetic number, because the mean of its divisors is an integer number (16701441).

Almost surely, 2^33402881 is an apocalyptic number.

It is an amenable number.

33402881 is a deficient number, since it is larger than the sum of its proper divisors (1).

33402881 is an equidigital number, since it uses as much as digits as its factorization.

33402881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 33402881 is about 5779.5225581357. The cubic root of 33402881 is about 322.0534644966.

The spelling of 33402881 in words is "thirty-three million, four hundred two thousand, eight hundred eighty-one".