2163161 has 16 divisors (see below), whose sum is σ = 2905728. Its totient is φ = 1555200.

The previous prime is 2163137. The next prime is 2163163. The reversal of 2163161 is 1613612.

It is a cyclic number.

It is not a de Polignac number, because 2163161 - 2¹⁰ = 2162137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2163163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80 + ... + 2081.

It is an arithmetic number, because the mean of its divisors is an integer number (181608).

2^2163161 is an apocalyptic number.

It is an amenable number.

2163161 is a deficient number, since it is larger than the sum of its proper divisors (742567).

2163161 is a wasteful number, since it uses less digits than its factorization.

2163161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2192.

The product of its digits is 216, while the sum is 20.

The square root of 2163161 is about 1470.7688465561. The cubic root of 2163161 is about 129.3291077787.

Adding to 2163161 its reverse (1613612), we get a palindrome (3776773).

The spelling of 2163161 in words is "two million, one hundred sixty-three thousand, one hundred sixty-one".