33305145 has 16 divisors (see below), whose sum is σ = 53364480. Its totient is φ = 17737344.

The previous prime is 33305131. The next prime is 33305149. The reversal of 33305145 is 54150333.

It is a happy number.

It is not a de Polignac number, because 33305145 - 2⁵ = 33305113 is a prime.

It is a super-2 number, since 2×33305145² = 2218465366942050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33305149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14517 + ... + 16653.

It is an arithmetic number, because the mean of its divisors is an integer number (3335280).

Almost surely, 2^33305145 is an apocalyptic number.

It is an amenable number.

33305145 is a deficient number, since it is larger than the sum of its proper divisors (20059335).

33305145 is a wasteful number, since it uses less digits than its factorization.

33305145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3184.

The product of its (nonzero) digits is 2700, while the sum is 24.

The square root of 33305145 is about 5771.0609943060. The cubic root of 33305145 is about 321.7390508292.

Adding to 33305145 its reverse (54150333), we get a palindrome (87455478).

The spelling of 33305145 in words is "thirty-three million, three hundred five thousand, one hundred forty-five".