2163381 has 8 divisors (see below), whose sum is σ = 3146784. Its totient is φ = 1311120.

The previous prime is 2163361. The next prime is 2163401. The reversal of 2163381 is 1833612.

It is an interprime number because it is at equal distance from previous prime (2163361) and next prime (2163401).

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

It is not a de Polignac number, because 2163381 - 2⁵ = 2163349 is a prime.

It is a super-2 number, since 2×2163381² = 9360434702322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2163341) 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, 32746 + ... + 32811.

It is an arithmetic number, because the mean of its divisors is an integer number (393348).

2^2163381 is an apocalyptic number.

It is an amenable number.

2163381 is a deficient number, since it is larger than the sum of its proper divisors (983403).

2163381 is a wasteful number, since it uses less digits than its factorization.

2163381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65571.

The product of its digits is 864, while the sum is 24.

The square root of 2163381 is about 1470.8436354691. The cubic root of 2163381 is about 129.3334920169. Note that the first 3 decimals are identical.

Adding to 2163381 its reverse (1833612), we get a palindrome (3996993).

The spelling of 2163381 in words is "two million, one hundred sixty-three thousand, three hundred eighty-one".