2182123871 has 4 divisors (see below), whose sum is σ = 2214692952. Its totient is φ = 2149554792.

The previous prime is 2182123861. The next prime is 2182123891. The reversal of 2182123871 is 1783212812.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2182123871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2182123831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16284440 + ... + 16284573.

It is an arithmetic number, because the mean of its divisors is an integer number (553673238).

Almost surely, 2^2182123871 is an apocalyptic number.

2182123871 is a deficient number, since it is larger than the sum of its proper divisors (32569081).

2182123871 is an equidigital number, since it uses as much as digits as its factorization.

2182123871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32569080.

The product of its digits is 10752, while the sum is 35.

The square root of 2182123871 is about 46713.2087422819. The cubic root of 2182123871 is about 1297.0592047641.

The spelling of 2182123871 in words is "two billion, one hundred eighty-two million, one hundred twenty-three thousand, eight hundred seventy-one".