2171181320 has 64 divisors (see below), whose sum is σ = 6090595200. Its totient is φ = 676730880.

The previous prime is 2171181307. The next prime is 2171181371. The reversal of 2171181320 is 231811712.

It is a self number, because there is not a number n which added to its sum of digits gives 2171181320.

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 15 ways as a sum of consecutive naturals, for example, 349385 + ... + 355544.

It is an arithmetic number, because the mean of its divisors is an integer number (95165550).

Almost surely, 2^2171181320 is an apocalyptic number.

2171181320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2171181320 is an abundant number, since it is smaller than the sum of its proper divisors (3919413880).

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

2171181320 is a wasteful number, since it uses less digits than its factorization.

2171181320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704958 (or 704954 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 26.

The square root of 2171181320 is about 46595.9367327238. The cubic root of 2171181320 is about 1294.8874784838.

The spelling of 2171181320 in words is "two billion, one hundred seventy-one million, one hundred eighty-one thousand, three hundred twenty".