165244001 has 8 divisors (see below), whose sum is σ = 184091880. Its totient is φ = 147272832.

The previous prime is 165243997. The next prime is 165244003. The reversal of 165244001 is 100442561.

165244001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2808976 + 162435025 = 1676^2 + 12745^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 165244001 - 2² = 165243997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165244003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218780 + ... + 219533.

It is an arithmetic number, because the mean of its divisors is an integer number (23011485).

Almost surely, 2^165244001 is an apocalyptic number.

It is an amenable number.

165244001 is a deficient number, since it is larger than the sum of its proper divisors (18847879).

165244001 is a wasteful number, since it uses less digits than its factorization.

165244001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438355.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 165244001 is about 12854.7267960078. The cubic root of 165244001 is about 548.7508853717.

Adding to 165244001 its reverse (100442561), we get a palindrome (265686562).

The spelling of 165244001 in words is "one hundred sixty-five million, two hundred forty-four thousand, one".