165212167 has 4 divisors (see below), whose sum is σ = 166135320. Its totient is φ = 164289016.

The previous prime is 165212161. The next prime is 165212207. The reversal of 165212167 is 761212561.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 165212167 - 2¹⁹ = 164687879 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165212161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 461308 + ... + 461665.

It is an arithmetic number, because the mean of its divisors is an integer number (41533830).

Almost surely, 2^165212167 is an apocalyptic number.

165212167 is a deficient number, since it is larger than the sum of its proper divisors (923153).

165212167 is an equidigital number, since it uses as much as digits as its factorization.

165212167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923152.

The product of its digits is 5040, while the sum is 31.

The square root of 165212167 is about 12853.4885147963. The cubic root of 165212167 is about 548.7156444402.

The spelling of 165212167 in words is "one hundred sixty-five million, two hundred twelve thousand, one hundred sixty-seven".