2171339280 has 240 divisors, whose sum is σ = 8423460864. Its totient is φ = 495390720.

The previous prime is 2171339251. The next prime is 2171339321. The reversal of 2171339280 is 829331712.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 126577 + ... + 142703.

Almost surely, 2^2171339280 is an apocalyptic number.

2171339280 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 2171339280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4211730432).

2171339280 is an abundant number, since it is smaller than the sum of its proper divisors (6252121584).

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

2171339280 is a wasteful number, since it uses less digits than its factorization.

2171339280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16174 (or 16165 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 2171339280 is about 46597.6316994759. The cubic root of 2171339280 is about 1294.9188800476.

The spelling of 2171339280 in words is "two billion, one hundred seventy-one million, three hundred thirty-nine thousand, two hundred eighty".