165422531218 has 16 divisors (see below), whose sum is σ = 295911112320. Its totient is φ = 67812962976.

The previous prime is 165422531213. The next prime is 165422531249. The reversal of 165422531218 is 812135224561.

It is a happy number.

It is a super-2 number, since 2×165422531218² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (165422531213) 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 7 ways as a sum of consecutive naturals, for example, 256866963 + ... + 256867606.

It is an arithmetic number, because the mean of its divisors is an integer number (18494444520).

Almost surely, 2^165422531218 is an apocalyptic number.

165422531218 is a deficient number, since it is larger than the sum of its proper divisors (130488581102).

165422531218 is a wasteful number, since it uses less digits than its factorization.

165422531218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513734601.

The product of its digits is 115200, while the sum is 40.

Adding to 165422531218 its reverse (812135224561), we get a palindrome (977557755779).

The spelling of 165422531218 in words is "one hundred sixty-five billion, four hundred twenty-two million, five hundred thirty-one thousand, two hundred eighteen".