33135881 has 2 divisors, whose sum is σ = 33135882. Its totient is φ = 33135880.

The previous prime is 33135877. The next prime is 33135887. The reversal of 33135881 is 18853133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27206656 + 5929225 = 5216^2 + 2435^2 .

It is a cyclic number.

It is not a de Polignac number, because 33135881 - 2² = 33135877 is a prime.

It is a super-2 number, since 2×33135881² = 2195973219292322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (33135887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16567940 + 16567941.

It is an arithmetic number, because the mean of its divisors is an integer number (16567941).

Almost surely, 2^33135881 is an apocalyptic number.

It is an amenable number.

33135881 is a deficient number, since it is larger than the sum of its proper divisors (1).

33135881 is an equidigital number, since it uses as much as digits as its factorization.

33135881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 32.

The square root of 33135881 is about 5756.3774198709. The cubic root of 33135881 is about 321.1930755522.

The spelling of 33135881 in words is "thirty-three million, one hundred thirty-five thousand, eight hundred eighty-one".