133507165 has 12 divisors (see below), whose sum is σ = 176097852. Its totient is φ = 97095680.

The previous prime is 133507141. The next prime is 133507177. The reversal of 133507165 is 561705331.

It can be written as a sum of positive squares in 2 ways, for example, as 29528356 + 103978809 = 5434^2 + 10197^2 .

It is not a de Polignac number, because 133507165 - 2⁵ = 133507133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109732 + ... + 110941.

It is an arithmetic number, because the mean of its divisors is an integer number (14674821).

Almost surely, 2^133507165 is an apocalyptic number.

It is an amenable number.

133507165 is a deficient number, since it is larger than the sum of its proper divisors (42590687).

133507165 is a wasteful number, since it uses less digits than its factorization.

133507165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220700 (or 220689 counting only the distinct ones).

The product of its (nonzero) digits is 9450, while the sum is 31.

The square root of 133507165 is about 11554.5300640052. The cubic root of 133507165 is about 511.0948732589.

The spelling of 133507165 in words is "one hundred thirty-three million, five hundred seven thousand, one hundred sixty-five".