2143423305 has 24 divisors (see below), whose sum is σ = 3751345728. Its totient is φ = 1132058016.

The previous prime is 2143423171. The next prime is 2143423309. The reversal of 2143423305 is 5033243412.

2143423305 is a `hidden beast` number, since 2 + 14 + 342 + 3 + 305 = 666.

It is not a de Polignac number, because 2143423305 - 2¹⁴ = 2143406921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2143423309) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 226587 + ... + 235856.

It is an arithmetic number, because the mean of its divisors is an integer number (156306072).

Almost surely, 2^2143423305 is an apocalyptic number.

It is an amenable number.

2143423305 is a deficient number, since it is larger than the sum of its proper divisors (1607922423).

2143423305 is a wasteful number, since it uses less digits than its factorization.

2143423305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462557 (or 462554 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

The square root of 2143423305 is about 46297.1198348234. The cubic root of 2143423305 is about 1289.3455216227.

Adding to 2143423305 its reverse (5033243412), we get a palindrome (7176666717).

The spelling of 2143423305 in words is "two billion, one hundred forty-three million, four hundred twenty-three thousand, three hundred five".