33072533 has 4 divisors (see below), whose sum is σ = 35616588. Its totient is φ = 30528480.

The previous prime is 33072517. The next prime is 33072539. The reversal of 33072533 is 33527033.

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 22819729 + 10252804 = 4777^2 + 3202^2 .

It is a cyclic number.

It is not a de Polignac number, because 33072533 - 2⁴ = 33072517 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 (33072539) 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, 1272008 + ... + 1272033.

It is an arithmetic number, because the mean of its divisors is an integer number (8904147).

Almost surely, 2^33072533 is an apocalyptic number.

It is an amenable number.

33072533 is a deficient number, since it is larger than the sum of its proper divisors (2544055).

33072533 is a wasteful number, since it uses less digits than its factorization.

33072533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2544054.

The product of its (nonzero) digits is 5670, while the sum is 26.

The square root of 33072533 is about 5750.8723686063. The cubic root of 33072533 is about 320.9882631423.

Adding to 33072533 its reverse (33527033), we get a palindrome (66599566).

The spelling of 33072533 in words is "thirty-three million, seventy-two thousand, five hundred thirty-three".