2163321200 has 60 divisors (see below), whose sum is σ = 5209050528. Its totient is φ = 863385600.

The previous prime is 2163321197. The next prime is 2163321203. The reversal of 2163321200 is 21233612.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2163321197) and next prime (2163321203).

It is a super-2 number, since 2×2163321200² = 9359917228738880000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2163321203) 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 11 ways as a sum of consecutive naturals, for example, 179360 + ... + 191040.

Almost surely, 2^2163321200 is an apocalyptic number.

2163321200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2163321200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2604525264).

2163321200 is an abundant number, since it is smaller than the sum of its proper divisors (3045729328).

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

2163321200 is a wasteful number, since it uses less digits than its factorization.

2163321200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12162 (or 12151 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 2163321200 is about 46511.5168533558. The cubic root of 2163321200 is about 1293.3230033067.

Adding to 2163321200 its reverse (21233612), we get a palindrome (2184554812).

The spelling of 2163321200 in words is "two billion, one hundred sixty-three million, three hundred twenty-one thousand, two hundred".