33000081 has 4 divisors (see below), whose sum is σ = 44000112. Its totient is φ = 22000052.

The previous prime is 33000059. The next prime is 33000083. The reversal of 33000081 is 18000033.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18000033 = 3 ⋅6000011.

It is a cyclic number.

It is not a de Polignac number, because 33000081 - 2⁹ = 32999569 is a prime.

It is a super-2 number, since 2×33000081² = 2178010692013122, which contains 22 as substring.

33000081 is a modest number, since divided by 81 gives 33 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 33000081.

It is not an unprimeable number, because it can be changed into a prime (33000083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5500011 + ... + 5500016.

It is an arithmetic number, because the mean of its divisors is an integer number (11000028).

Almost surely, 2^33000081 is an apocalyptic number.

It is an amenable number.

33000081 is a deficient number, since it is larger than the sum of its proper divisors (11000031).

33000081 is a wasteful number, since it uses less digits than its factorization.

33000081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11000030.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 33000081 is about 5744.5696966788. The cubic root of 33000081 is about 320.7536954340.

The spelling of 33000081 in words is "thirty-three million, eighty-one", and thus it is an aban number and an uban number.