2181477280 has 48 divisors (see below), whose sum is σ = 5175394560. Its totient is φ = 868924672.

The previous prime is 2181477253. The next prime is 2181477307. The reversal of 2181477280 is 827741812.

It is an interprime number because it is at equal distance from previous prime (2181477253) and next prime (2181477307).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9717 + ... + 66763.

It is an arithmetic number, because the mean of its divisors is an integer number (107820720).

Almost surely, 2^2181477280 is an apocalyptic number.

2181477280 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 2181477280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2587697280).

2181477280 is an abundant number, since it is smaller than the sum of its proper divisors (2993917280).

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

2181477280 is a wasteful number, since it uses less digits than its factorization.

2181477280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57301 (or 57293 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 40.

The square root of 2181477280 is about 46706.2873711880. The cubic root of 2181477280 is about 1296.9310804065.

The spelling of 2181477280 in words is "two billion, one hundred eighty-one million, four hundred seventy-seven thousand, two hundred eighty".