2171370220 has 48 divisors (see below), whose sum is σ = 4877953920. Its totient is φ = 809017344.

The previous prime is 2171370191. The next prime is 2171370233. The reversal of 2171370220 is 220731712.

2171370220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61 + ... + 65899.

It is an arithmetic number, because the mean of its divisors is an integer number (101624040).

Almost surely, 2^2171370220 is an apocalyptic number.

2171370220 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 2171370220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2438976960).

2171370220 is an abundant number, since it is smaller than the sum of its proper divisors (2706583700).

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

2171370220 is a wasteful number, since it uses less digits than its factorization.

2171370220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65962 (or 65960 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 2171370220 is about 46597.9636894146. The cubic root of 2171370220 is about 1294.9250305680.

The spelling of 2171370220 in words is "two billion, one hundred seventy-one million, three hundred seventy thousand, two hundred twenty".