33105145 has 4 divisors (see below), whose sum is σ = 39726180. Its totient is φ = 26484112.

The previous prime is 33105139. The next prime is 33105151. The reversal of 33105145 is 54150133.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (33105139) and next prime (33105151).

It can be written as a sum of positive squares in 2 ways, for example, as 25130169 + 7974976 = 5013^2 + 2824^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33105145 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3310510 + ... + 3310519.

It is an arithmetic number, because the mean of its divisors is an integer number (9931545).

Almost surely, 2^33105145 is an apocalyptic number.

It is an amenable number.

33105145 is a deficient number, since it is larger than the sum of its proper divisors (6621035).

33105145 is an equidigital number, since it uses as much as digits as its factorization.

33105145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6621034.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 33105145 is about 5753.7070658837. The cubic root of 33105145 is about 321.0937346560.

Adding to 33105145 its reverse (54150133), we get a palindrome (87255278).

The spelling of 33105145 in words is "thirty-three million, one hundred five thousand, one hundred forty-five".