165121214 has 8 divisors (see below), whose sum is σ = 247820088. Its totient is φ = 82514520.

The previous prime is 165121213. The next prime is 165121237. The reversal of 165121214 is 412121561.

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

It is a self number, because there is not a number n which added to its sum of digits gives 165121214.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165121211) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 18377 + ... + 25844.

It is an arithmetic number, because the mean of its divisors is an integer number (30977511).

Almost surely, 2^165121214 is an apocalyptic number.

165121214 is a deficient number, since it is larger than the sum of its proper divisors (82698874).

165121214 is a wasteful number, since it uses less digits than its factorization.

165121214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46090.

The product of its digits is 480, while the sum is 23.

The square root of 165121214 is about 12849.9499609921. The cubic root of 165121214 is about 548.6149325372.

Adding to 165121214 its reverse (412121561), we get a palindrome (577242775).

The spelling of 165121214 in words is "one hundred sixty-five million, one hundred twenty-one thousand, two hundred fourteen".