2181334272 has 144 divisors (see below), whose sum is σ = 6398766528. Its totient is φ = 655441920.

The previous prime is 2181334271. The next prime is 2181334279. The reversal of 2181334272 is 2724331812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2181334271) 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, 426772 + ... + 431852.

Almost surely, 2^2181334272 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 2181334272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3199383264).

2181334272 is an abundant number, since it is smaller than the sum of its proper divisors (4217432256).

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

2181334272 is a wasteful number, since it uses less digits than its factorization.

2181334272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5156 (or 5142 counting only the distinct ones).

The product of its digits is 16128, while the sum is 33.

The square root of 2181334272 is about 46704.7564173072. The cubic root of 2181334272 is about 1296.9027394324.

The spelling of 2181334272 in words is "two billion, one hundred eighty-one million, three hundred thirty-four thousand, two hundred seventy-two".