2001771171 has 16 divisors (see below), whose sum is σ = 2974147200. Its totient is φ = 1330662024.

The previous prime is 2001771169. The next prime is 2001771209. The reversal of 2001771171 is 1711771002.

It is not a de Polignac number, because 2001771171 - 2¹ = 2001771169 is a prime.

It is a super-2 number, since 2×2001771171² = 8014175642093422482, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (2001771071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97461 + ... + 116198.

It is an arithmetic number, because the mean of its divisors is an integer number (185884200).

Almost surely, 2^2001771171 is an apocalyptic number.

2001771171 is a deficient number, since it is larger than the sum of its proper divisors (972376029).

2001771171 is a wasteful number, since it uses less digits than its factorization.

2001771171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214015 (or 214009 counting only the distinct ones).

The product of its (nonzero) digits is 686, while the sum is 27.

The square root of 2001771171 is about 44741.1574615588. The cubic root of 2001771171 is about 1260.2928627634.

The spelling of 2001771171 in words is "two billion, one million, seven hundred seventy-one thousand, one hundred seventy-one".