2181477210 has 128 divisors (see below), whose sum is σ = 6115046400. Its totient is φ = 492433920.

The previous prime is 2181477209. The next prime is 2181477211. The reversal of 2181477210 is 127741812.

It is an interprime number because it is at equal distance from previous prime (2181477209) and next prime (2181477211).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (2181477211) 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 63 ways as a sum of consecutive naturals, for example, 366982 + ... + 372878.

It is an arithmetic number, because the mean of its divisors is an integer number (47773800).

Almost surely, 2^2181477210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2181477210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3057523200).

2181477210 is an abundant number, since it is smaller than the sum of its proper divisors (3933569190).

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

2181477210 is a wasteful number, since it uses less digits than its factorization.

2181477210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5996.

The product of its (nonzero) digits is 6272, while the sum is 33.

The square root of 2181477210 is about 46706.2866218243. The cubic root of 2181477210 is about 1296.9310665343.

The spelling of 2181477210 in words is "two billion, one hundred eighty-one million, four hundred seventy-seven thousand, two hundred ten".