33040505521 has 4 divisors (see below), whose sum is σ = 33361287232. Its totient is φ = 32719723812.

The previous prime is 33040505473. The next prime is 33040505539. The reversal of 33040505521 is 12550504033.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 33040505521 - 2⁹ = 33040505009 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 33040505521.

It is not an unprimeable number, because it can be changed into a prime (33040505551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160390701 + ... + 160390906.

It is an arithmetic number, because the mean of its divisors is an integer number (8340321808).

Almost surely, 2^33040505521 is an apocalyptic number.

It is an amenable number.

33040505521 is a deficient number, since it is larger than the sum of its proper divisors (320781711).

33040505521 is a wasteful number, since it uses less digits than its factorization.

33040505521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320781710.

The product of its (nonzero) digits is 9000, while the sum is 28.

The spelling of 33040505521 in words is "thirty-three billion, forty million, five hundred five thousand, five hundred twenty-one".