2143442101 has 4 divisors (see below), whose sum is σ = 2143646092. Its totient is φ = 2143238112.

The previous prime is 2143442053. The next prime is 2143442107. The reversal of 2143442101 is 1012443412.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 689850225 + 1453591876 = 26265^2 + 38126^2 .

It is a cyclic number.

It is not a de Polignac number, because 2143442101 - 2¹⁷ = 2143311029 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 (2143442107) 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, 85326 + ... + 107551.

It is an arithmetic number, because the mean of its divisors is an integer number (535911523).

Almost surely, 2^2143442101 is an apocalyptic number.

It is an amenable number.

2143442101 is a deficient number, since it is larger than the sum of its proper divisors (203991).

2143442101 is a wasteful number, since it uses less digits than its factorization.

2143442101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203990.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 2143442101 is about 46297.3228275675. The cubic root of 2143442101 is about 1289.3492904330.

Adding to 2143442101 its reverse (1012443412), we get a palindrome (3155885513).

The spelling of 2143442101 in words is "two billion, one hundred forty-three million, four hundred forty-two thousand, one hundred one".