133829221 has 8 divisors (see below), whose sum is σ = 135864000. Its totient is φ = 131800032.

The previous prime is 133829197. The next prime is 133829233. The reversal of 133829221 is 122928331.

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

It is a cyclic number.

It is not a de Polignac number, because 133829221 - 2¹³ = 133821029 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 (133829261) 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, 88530 + ... + 90028.

It is an arithmetic number, because the mean of its divisors is an integer number (16983000).

Almost surely, 2^133829221 is an apocalyptic number.

It is an amenable number.

133829221 is a deficient number, since it is larger than the sum of its proper divisors (2034779).

133829221 is a wasteful number, since it uses less digits than its factorization.

133829221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2795.

The product of its digits is 5184, while the sum is 31.

The square root of 133829221 is about 11568.4580217071. The cubic root of 133829221 is about 511.5055103788.

The spelling of 133829221 in words is "one hundred thirty-three million, eight hundred twenty-nine thousand, two hundred twenty-one".