133545165 has 64 divisors (see below), whose sum is σ = 238318080. Its totient is φ = 63452160.

The previous prime is 133545161. The next prime is 133545187. The reversal of 133545165 is 561545331.

It is not a de Polignac number, because 133545165 - 2² = 133545161 is a prime.

It is a super-2 number, since 2×133545165² = 35668622189754450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133545161) 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 63 ways as a sum of consecutive naturals, for example, 1225131 + ... + 1225239.

It is an arithmetic number, because the mean of its divisors is an integer number (3723720).

Almost surely, 2^133545165 is an apocalyptic number.

133545165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

133545165 is a deficient number, since it is larger than the sum of its proper divisors (104772915).

133545165 is a wasteful number, since it uses less digits than its factorization.

133545165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294.

The product of its digits is 27000, while the sum is 33.

The square root of 133545165 is about 11556.1743237111. The cubic root of 133545165 is about 511.1433594527.

The spelling of 133545165 in words is "one hundred thirty-three million, five hundred forty-five thousand, one hundred sixty-five".