33042013 has 4 divisors (see below), whose sum is σ = 33055900. Its totient is φ = 33028128.

The previous prime is 33042011. The next prime is 33042019. The reversal of 33042013 is 31024033.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31024033 = 23 ⋅1348871.

It can be written as a sum of positive squares in 2 ways, for example, as 5184729 + 27857284 = 2277^2 + 5278^2 .

It is a cyclic number.

It is not a de Polignac number, because 33042013 - 2¹ = 33042011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33042011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2370 + ... + 8467.

It is an arithmetic number, because the mean of its divisors is an integer number (8263975).

Almost surely, 2^33042013 is an apocalyptic number.

It is an amenable number.

33042013 is a deficient number, since it is larger than the sum of its proper divisors (13887).

33042013 is a wasteful number, since it uses less digits than its factorization.

33042013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13886.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 33042013 is about 5748.2182456827. The cubic root of 33042013 is about 320.8894946081.

Adding to 33042013 its reverse (31024033), we get a palindrome (64066046).

The spelling of 33042013 in words is "thirty-three million, forty-two thousand, thirteen".