133505165 has 8 divisors (see below), whose sum is σ = 169630200. Its totient is φ = 100521472.

The previous prime is 133505137. The next prime is 133505167. The reversal of 133505165 is 561505331.

It can be written as a sum of positive squares in 4 ways, for example, as 59923081 + 73582084 = 7741^2 + 8578^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 133505165 - 2¹⁰ = 133504141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133505167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 785240 + ... + 785409.

It is an arithmetic number, because the mean of its divisors is an integer number (21203775).

Almost surely, 2^133505165 is an apocalyptic number.

It is an amenable number.

133505165 is a deficient number, since it is larger than the sum of its proper divisors (36125035).

133505165 is a wasteful number, since it uses less digits than its factorization.

133505165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1570671.

The product of its (nonzero) digits is 6750, while the sum is 29.

The square root of 133505165 is about 11554.4435175390. The cubic root of 133505165 is about 511.0923210991.

The spelling of 133505165 in words is "one hundred thirty-three million, five hundred five thousand, one hundred sixty-five".