33012013 has 4 divisors (see below), whose sum is σ = 33056380. Its totient is φ = 32967648.

The previous prime is 33011983. The next prime is 33012019. The reversal of 33012013 is 31021033.

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 9847044 + 23164969 = 3138^2 + 4813^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33012013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33011984 and 33012002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33012019) 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, 21048 + ... + 22561.

It is an arithmetic number, because the mean of its divisors is an integer number (8264095).

Almost surely, 2^33012013 is an apocalyptic number.

It is an amenable number.

33012013 is a deficient number, since it is larger than the sum of its proper divisors (44367).

33012013 is an equidigital number, since it uses as much as digits as its factorization.

33012013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44366.

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 33012013 is about 5745.6081488386. The cubic root of 33012013 is about 320.7923496008.

Adding to 33012013 its reverse (31021033), we get a palindrome (64033046).

The spelling of 33012013 in words is "thirty-three million, twelve thousand, thirteen".