2180256171 has 12 divisors (see below), whose sum is σ = 3088068792. Its totient is φ = 1368003328.

The previous prime is 2180256167. The next prime is 2180256193. The reversal of 2180256171 is 1716520812.

It is not a de Polignac number, because 2180256171 - 2² = 2180256167 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2180256271) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1256490 + ... + 1258223.

It is an arithmetic number, because the mean of its divisors is an integer number (257339066).

Almost surely, 2^2180256171 is an apocalyptic number.

2180256171 is a deficient number, since it is larger than the sum of its proper divisors (907812621).

2180256171 is a wasteful number, since it uses less digits than its factorization.

2180256171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2514750 (or 2514733 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 33.

The square root of 2180256171 is about 46693.2133291338. The cubic root of 2180256171 is about 1296.6890441468.

Adding to 2180256171 its reverse (1716520812), we get a palindrome (3896776983).

The spelling of 2180256171 in words is "two billion, one hundred eighty million, two hundred fifty-six thousand, one hundred seventy-one".