2187233280 has 336 divisors, whose sum is σ = 7895372940. Its totient is φ = 581271552.

The previous prime is 2187233239. The next prime is 2187233287. The reversal of 2187233280 is 823327812.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2096907264 + 90326016 = 45792^2 + 9504^2 .

It is a super-2 number, since 2×2187233280² = 9567978842279116800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (2187233287) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 7464814 + ... + 7465106.

Almost surely, 2^2187233280 is an apocalyptic number.

2187233280 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 2187233280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3947686470).

2187233280 is an abundant number, since it is smaller than the sum of its proper divisors (5708139660).

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

2187233280 is an frugal number, since it uses more digits than its factorization.

2187233280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338 (or 303 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 2187233280 is about 46767.8658910154. The cubic root of 2187233280 is about 1298.0707636221.

The spelling of 2187233280 in words is "two billion, one hundred eighty-seven million, two hundred thirty-three thousand, two hundred eighty".