2163312 has 60 divisors (see below), whose sum is σ = 6161064. Its totient is φ = 708480.

The previous prime is 2163307. The next prime is 2163341. The reversal of 2163312 is 2133612.

2163312 is a `hidden beast` number, since 21 + 633 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a d-powerful number, because it can be written as 2⁹ + 1 + 6² + 3⁸ + 3¹⁰ + 1 + 2²¹ .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11862 + ... + 12042.

2^2163312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2163312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3080532).

2163312 is an abundant number, since it is smaller than the sum of its proper divisors (3997752).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2163312 is a wasteful number, since it uses less digits than its factorization.

2163312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278 (or 269 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 2163312 is about 1470.8201793557. The cubic root of 2163312 is about 129.3321169924.

Adding to 2163312 its reverse (2133612), we get a palindrome (4296924).

The spelling of 2163312 in words is "two million, one hundred sixty-three thousand, three hundred twelve".