2002143561 has 24 divisors (see below), whose sum is σ = 2962814400. Its totient is φ = 1201617120.

The previous prime is 2002143547. The next prime is 2002143569. The reversal of 2002143561 is 1653412002.

It is not a de Polignac number, because 2002143561 - 2⁶ = 2002143497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2002143569) 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, 10615 + ... + 64163.

It is an arithmetic number, because the mean of its divisors is an integer number (123450600).

Almost surely, 2^2002143561 is an apocalyptic number.

It is an amenable number.

2002143561 is a deficient number, since it is larger than the sum of its proper divisors (960670839).

2002143561 is a wasteful number, since it uses less digits than its factorization.

2002143561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53677 (or 53666 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 2002143561 is about 44745.3188724810. The cubic root of 2002143561 is about 1260.3710087850.

Adding to 2002143561 its reverse (1653412002), we get a palindrome (3655555563).

The spelling of 2002143561 in words is "two billion, two million, one hundred forty-three thousand, five hundred sixty-one".