165312001 has 8 divisors (see below), whose sum is σ = 166222080. Its totient is φ = 164405232.

The previous prime is 165311999. The next prime is 165312011. The reversal of 165312001 is 100213561.

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 165312001 - 2¹ = 165311999 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 165312001.

It is not an unprimeable number, because it can be changed into a prime (165312011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 269371 + ... + 269983.

It is an arithmetic number, because the mean of its divisors is an integer number (20777760).

Almost surely, 2^165312001 is an apocalyptic number.

It is an amenable number.

165312001 is a deficient number, since it is larger than the sum of its proper divisors (910079).

165312001 is an equidigital number, since it uses as much as digits as its factorization.

165312001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1655.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 165312001 is about 12857.3714654279. The cubic root of 165312001 is about 548.8261476961.

Adding to 165312001 its reverse (100213561), we get a palindrome (265525562).

The spelling of 165312001 in words is "one hundred sixty-five million, three hundred twelve thousand, one".