33506506221 has 8 divisors (see below), whose sum is σ = 44676355104. Its totient is φ = 22337164080.

The previous prime is 33506506211. The next prime is 33506506223. The reversal of 33506506221 is 12260560533.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 33506506221 - 2⁶ = 33506506157 is a prime.

It is a super-2 number, since 2×33506506221² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33506506223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72211 + ... + 268751.

It is an arithmetic number, because the mean of its divisors is an integer number (5584544388).

Almost surely, 2^33506506221 is an apocalyptic number.

It is an amenable number.

33506506221 is a deficient number, since it is larger than the sum of its proper divisors (11169848883).

33506506221 is a wasteful number, since it uses less digits than its factorization.

33506506221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253371.

The product of its (nonzero) digits is 32400, while the sum is 33.

The spelling of 33506506221 in words is "thirty-three billion, five hundred six million, five hundred six thousand, two hundred twenty-one".