2180221671 has 16 divisors (see below), whose sum is σ = 3061008000. Its totient is φ = 1376510688.

The previous prime is 2180221657. The next prime is 2180221753. The reversal of 2180221671 is 1761220812.

It is not a de Polignac number, because 2180221671 - 2⁵ = 2180221639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2180221651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 246280 + ... + 254978.

It is an arithmetic number, because the mean of its divisors is an integer number (191313000).

Almost surely, 2^2180221671 is an apocalyptic number.

2180221671 is a deficient number, since it is larger than the sum of its proper divisors (880786329).

2180221671 is a wasteful number, since it uses less digits than its factorization.

2180221671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13118.

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 2180221671 is about 46692.8438949696. The cubic root of 2180221671 is about 1296.6822045823.

The spelling of 2180221671 in words is "two billion, one hundred eighty million, two hundred twenty-one thousand, six hundred seventy-one".