2161144423 has 4 divisors (see below), whose sum is σ = 2255107248. Its totient is φ = 2067181600.

The previous prime is 2161144421. The next prime is 2161144451. The reversal of 2161144423 is 3244411612.

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 2161144423 - 2¹ = 2161144421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2161144391 and 2161144400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161144421) 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, 46981378 + ... + 46981423.

It is an arithmetic number, because the mean of its divisors is an integer number (563776812).

Almost surely, 2^2161144423 is an apocalyptic number.

2161144423 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2161144423 is a deficient number, since it is larger than the sum of its proper divisors (93962825).

2161144423 is an equidigital number, since it uses as much as digits as its factorization.

2161144423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93962824.

The product of its digits is 4608, while the sum is 28.

The square root of 2161144423 is about 46488.1105552807. The cubic root of 2161144423 is about 1292.8890685836.

The spelling of 2161144423 in words is "two billion, one hundred sixty-one million, one hundred forty-four thousand, four hundred twenty-three".