33001145 has 4 divisors (see below), whose sum is σ = 39601380. Its totient is φ = 26400912.

The previous prime is 33001141. The next prime is 33001147. The reversal of 33001145 is 54110033.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5669161 + 27331984 = 2381^2 + 5228^2 .

It is a cyclic number.

It is not a de Polignac number, because 33001145 - 2² = 33001141 is a prime.

It is a super-2 number, since 2×33001145² = 2178151142622050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33001141) by changing a digit.

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, 3300110 + ... + 3300119.

It is an arithmetic number, because the mean of its divisors is an integer number (9900345).

Almost surely, 2^33001145 is an apocalyptic number.

It is an amenable number.

33001145 is a deficient number, since it is larger than the sum of its proper divisors (6600235).

33001145 is an equidigital number, since it uses as much as digits as its factorization.

33001145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6600234.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 33001145 is about 5744.6623051316. The cubic root of 33001145 is about 320.7571426807.

Adding to 33001145 its reverse (54110033), we get a palindrome (87111178).

The spelling of 33001145 in words is "thirty-three million, one thousand, one hundred forty-five".