2172127671 has 112 divisors (see below), whose sum is σ = 4016643840. Its totient is φ = 1146337920.

The previous prime is 2172127669. The next prime is 2172127703. The reversal of 2172127671 is 1767212712.

It is not a de Polignac number, because 2172127671 - 2¹ = 2172127669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172127171) by changing a digit.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 4168891 + ... + 4169411.

Almost surely, 2^2172127671 is an apocalyptic number.

2172127671 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2172127671 is a deficient number, since it is larger than the sum of its proper divisors (1844516169).

2172127671 is an equidigital number, since it uses as much as digits as its factorization.

2172127671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608 (or 593 counting only the distinct ones).

The product of its digits is 16464, while the sum is 36.

The square root of 2172127671 is about 46606.0904925526. The cubic root of 2172127671 is about 1295.0755850001.

The spelling of 2172127671 in words is "two billion, one hundred seventy-two million, one hundred twenty-seven thousand, six hundred seventy-one".