165322001 has 4 divisors (see below), whose sum is σ = 178039092. Its totient is φ = 152604912.

The previous prime is 165321997. The next prime is 165322019. The reversal of 165322001 is 100223561.

165322001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 100223561 = 1447 ⋅69263.

It can be written as a sum of positive squares in 2 ways, for example, as 76038400 + 89283601 = 8720^2 + 9449^2 .

It is a cyclic number.

It is not a de Polignac number, because 165322001 - 2² = 165321997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165322061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6358526 + ... + 6358551.

It is an arithmetic number, because the mean of its divisors is an integer number (44509773).

Almost surely, 2^165322001 is an apocalyptic number.

It is an amenable number.

165322001 is a deficient number, since it is larger than the sum of its proper divisors (12717091).

165322001 is a wasteful number, since it uses less digits than its factorization.

165322001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12717090.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 165322001 is about 12857.7603415214. The cubic root of 165322001 is about 548.8372139442.

Adding to 165322001 its reverse (100223561), we get a palindrome (265545562).

The spelling of 165322001 in words is "one hundred sixty-five million, three hundred twenty-two thousand, one".