2154067171 has 4 divisors (see below), whose sum is σ = 2160993744. Its totient is φ = 2147140600.

The previous prime is 2154067169. The next prime is 2154067187. The reversal of 2154067171 is 1717604512.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2154067171 - 2¹ = 2154067169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2154067121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3462820 + ... + 3463441.

It is an arithmetic number, because the mean of its divisors is an integer number (540248436).

Almost surely, 2^2154067171 is an apocalyptic number.

2154067171 is a deficient number, since it is larger than the sum of its proper divisors (6926573).

2154067171 is an equidigital number, since it uses as much as digits as its factorization.

2154067171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6926572.

The product of its (nonzero) digits is 11760, while the sum is 34.

The square root of 2154067171 is about 46411.9291885179. The cubic root of 2154067171 is about 1291.4762202147.

The spelling of 2154067171 in words is "two billion, one hundred fifty-four million, sixty-seven thousand, one hundred seventy-one".