165216244 has 6 divisors (see below), whose sum is σ = 289128434. Its totient is φ = 82608120.

The previous prime is 165216241. The next prime is 165216253. The reversal of 165216244 is 442612561.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 105308644 + 59907600 = 10262^2 + 7740^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165216241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20652027 + ... + 20652034.

Almost surely, 2^165216244 is an apocalyptic number.

It is an amenable number.

165216244 is a deficient number, since it is larger than the sum of its proper divisors (123912190).

165216244 is a wasteful number, since it uses less digits than its factorization.

165216244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41304065 (or 41304063 counting only the distinct ones).

The product of its digits is 11520, while the sum is 31.

The square root of 165216244 is about 12853.6471088948. The cubic root of 165216244 is about 548.7201580207.

The spelling of 165216244 in words is "one hundred sixty-five million, two hundred sixteen thousand, two hundred forty-four".