165512223 has 12 divisors (see below), whose sum is σ = 239578560. Its totient is φ = 110108256.

The previous prime is 165512183. The next prime is 165512231. The reversal of 165512223 is 322215561.

It is a happy number.

165512223 is a `hidden beast` number, since 1 + 655 + 1 + 2 + 2 + 2 + 3 = 666.

It is not a de Polignac number, because 165512223 - 2⁸ = 165511967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165512423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14886 + ... + 23507.

It is an arithmetic number, because the mean of its divisors is an integer number (19964880).

Almost surely, 2^165512223 is an apocalyptic number.

165512223 is a deficient number, since it is larger than the sum of its proper divisors (74066337).

165512223 is a wasteful number, since it uses less digits than its factorization.

165512223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38878 (or 38875 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 165512223 is about 12865.1553818833. The cubic root of 165512223 is about 549.0476333997.

Adding to 165512223 its reverse (322215561), we get a palindrome (487727784).

The spelling of 165512223 in words is "one hundred sixty-five million, five hundred twelve thousand, two hundred twenty-three".