133605165 has 8 divisors (see below), whose sum is σ = 213768288. Its totient is φ = 71256080.

The previous prime is 133605151. The next prime is 133605191. The reversal of 133605165 is 561506331.

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

It is not a de Polignac number, because 133605165 - 2⁸ = 133604909 is a prime.

It is a super-2 number, since 2×133605165² = 35700680229354450, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4453491 + ... + 4453520.

It is an arithmetic number, because the mean of its divisors is an integer number (26721036).

Almost surely, 2^133605165 is an apocalyptic number.

133605165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

133605165 is a deficient number, since it is larger than the sum of its proper divisors (80163123).

133605165 is an equidigital number, since it uses as much as digits as its factorization.

133605165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8907019.

The product of its (nonzero) digits is 8100, while the sum is 30.

The square root of 133605165 is about 11558.7700470249. The cubic root of 133605165 is about 511.2198978775.

The spelling of 133605165 in words is "one hundred thirty-three million, six hundred five thousand, one hundred sixty-five".