33000155 has 4 divisors (see below), whose sum is σ = 39600192. Its totient is φ = 26400120.

The previous prime is 33000139. The next prime is 33000197. The reversal of 33000155 is 55100033.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55100033 = 457 ⋅120569.

It is not a de Polignac number, because 33000155 - 2⁴ = 33000139 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3300011 + ... + 3300020.

It is an arithmetic number, because the mean of its divisors is an integer number (9900048).

Almost surely, 2^33000155 is an apocalyptic number.

33000155 is a deficient number, since it is larger than the sum of its proper divisors (6600037).

33000155 is an equidigital number, since it uses as much as digits as its factorization.

33000155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6600036.

The product of its (nonzero) digits is 225, while the sum is 17.

The square root of 33000155 is about 5744.5761375405. The cubic root of 33000155 is about 320.7539351885.

Adding to 33000155 its reverse (55100033), we get a palindrome (88100188).

The spelling of 33000155 in words is "thirty-three million, one hundred fifty-five", and thus it is an aban number.