165200507 has 4 divisors (see below), whose sum is σ = 165226296. Its totient is φ = 165174720.

The previous prime is 165200489. The next prime is 165200537. The reversal of 165200507 is 705002561.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 705002561 = 643 ⋅1096427.

It is a cyclic number.

It is not a de Polignac number, because 165200507 - 2¹⁰ = 165199483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165200537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4907 + ... + 18827.

It is an arithmetic number, because the mean of its divisors is an integer number (41306574).

Almost surely, 2^165200507 is an apocalyptic number.

165200507 is a deficient number, since it is larger than the sum of its proper divisors (25789).

165200507 is a wasteful number, since it uses less digits than its factorization.

165200507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25788.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 165200507 is about 12853.0349334311. The cubic root of 165200507 is about 548.7027354334.

The spelling of 165200507 in words is "one hundred sixty-five million, two hundred thousand, five hundred seven".