2161711443 has 24 divisors (see below), whose sum is σ = 2945715408. Its totient is φ = 1410083008.

The previous prime is 2161711439. The next prime is 2161711457. The reversal of 2161711443 is 3441171612.

It is not a de Polignac number, because 2161711443 - 2² = 2161711439 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2161711443.

It is not an unprimeable number, because it can be changed into a prime (2161711403) 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 23 ways as a sum of consecutive naturals, for example, 3310105 + ... + 3310757.

It is an arithmetic number, because the mean of its divisors is an integer number (122738142).

Almost surely, 2^2161711443 is an apocalyptic number.

2161711443 is a deficient number, since it is larger than the sum of its proper divisors (784003965).

2161711443 is an equidigital number, since it uses as much as digits as its factorization.

2161711443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1091 (or 1032 counting only the distinct ones).

The product of its digits is 4032, while the sum is 30.

The square root of 2161711443 is about 46494.2087038805. The cubic root of 2161711443 is about 1293.0021305717.

The spelling of 2161711443 in words is "two billion, one hundred sixty-one million, seven hundred eleven thousand, four hundred forty-three".