33013945 has 4 divisors (see below), whose sum is σ = 39616740. Its totient is φ = 26411152.

The previous prime is 33013921. The next prime is 33013951. The reversal of 33013945 is 54931033.

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 3767481 + 29246464 = 1941^2 + 5408^2 .

It is a cyclic number.

It is not a de Polignac number, because 33013945 - 2⁵ = 33013913 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, 3301390 + ... + 3301399.

It is an arithmetic number, because the mean of its divisors is an integer number (9904185).

Almost surely, 2^33013945 is an apocalyptic number.

It is an amenable number.

33013945 is a deficient number, since it is larger than the sum of its proper divisors (6602795).

33013945 is an equidigital number, since it uses as much as digits as its factorization.

33013945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6602794.

The product of its (nonzero) digits is 4860, while the sum is 28.

The square root of 33013945 is about 5745.7762747953. The cubic root of 33013945 is about 320.7986075119.

Adding to 33013945 its reverse (54931033), we get a palindrome (87944978).

The spelling of 33013945 in words is "thirty-three million, thirteen thousand, nine hundred forty-five".