2163001 has 4 divisors (see below), whose sum is σ = 2166004. Its totient is φ = 2160000.

The previous prime is 2162977. The next prime is 2163011. The reversal of 2163001 is 1003612.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 89401 + 2073600 = 299^2 + 1440^2 .

It is a 3-Lehmer number, since φ(2163001) divides (2163001-1)³.

It is a cyclic number.

It is not a de Polignac number, because 2163001 - 2¹¹ = 2160953 is a prime.

It is a Duffinian number.

2163001 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2163011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 301 + ... + 2101.

It is an arithmetic number, because the mean of its divisors is an integer number (541501).

It is a Poulet number, since it divides 2^2163000-1.

2^2163001 is an apocalyptic number.

2163001 is the 1201-st pentagonal number.

It is an amenable number.

2163001 is a deficient number, since it is larger than the sum of its proper divisors (3003).

2163001 is a wasteful number, since it uses less digits than its factorization.

2163001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3002.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 2163001 is about 1470.7144522306. The cubic root of 2163001 is about 129.3259190551.

Adding to 2163001 its reverse (1003612), we get a palindrome (3166613).

The spelling of 2163001 in words is "two million, one hundred sixty-three thousand, one".