133572165 has 16 divisors (see below), whose sum is σ = 217339200. Its totient is φ = 70030592.

The previous prime is 133572163. The next prime is 133572169. The reversal of 133572165 is 561275331.

It is a cyclic number.

It is not a de Polignac number, because 133572165 - 2¹ = 133572163 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133572163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74580 + ... + 76349.

It is an arithmetic number, because the mean of its divisors is an integer number (13583700).

Almost surely, 2^133572165 is an apocalyptic number.

133572165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

133572165 is a deficient number, since it is larger than the sum of its proper divisors (83767035).

133572165 is a wasteful number, since it uses less digits than its factorization.

133572165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150996.

The product of its digits is 18900, while the sum is 33.

The square root of 133572165 is about 11557.3424713469. The cubic root of 133572165 is about 511.1778045802.

The spelling of 133572165 in words is "one hundred thirty-three million, five hundred seventy-two thousand, one hundred sixty-five".