133145165 has 8 divisors (see below), whose sum is σ = 159877368. Its totient is φ = 106447360.

The previous prime is 133145153. The next prime is 133145171. The reversal of 133145165 is 561541331.

It can be written as a sum of positive squares in 4 ways, for example, as 20912329 + 112232836 = 4573^2 + 10594^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-133145165 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 869 + ... + 16341.

It is an arithmetic number, because the mean of its divisors is an integer number (19984671).

Almost surely, 2^133145165 is an apocalyptic number.

It is an amenable number.

133145165 is a deficient number, since it is larger than the sum of its proper divisors (26732203).

133145165 is a wasteful number, since it uses less digits than its factorization.

133145165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17199.

The product of its digits is 5400, while the sum is 29.

The square root of 133145165 is about 11538.8545792033. The cubic root of 133145165 is about 510.6325165051.

Adding to 133145165 its reverse (561541331), we get a palindrome (694686496).

The spelling of 133145165 in words is "one hundred thirty-three million, one hundred forty-five thousand, one hundred sixty-five".