2002147871 has 4 divisors (see below), whose sum is σ = 2007820032. Its totient is φ = 1996475712.

The previous prime is 2002147867. The next prime is 2002147883. The reversal of 2002147871 is 1787412002.

It is a happy number.

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 2002147871 - 2² = 2002147867 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 (2002147271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2835551 + ... + 2836256.

It is an arithmetic number, because the mean of its divisors is an integer number (501955008).

Almost surely, 2^2002147871 is an apocalyptic number.

2002147871 is a deficient number, since it is larger than the sum of its proper divisors (5672161).

2002147871 is an equidigital number, since it uses as much as digits as its factorization.

2002147871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5672160.

The product of its (nonzero) digits is 6272, while the sum is 32.

The square root of 2002147871 is about 44745.3670339176. The cubic root of 2002147871 is about 1260.3719131816.

Adding to 2002147871 its reverse (1787412002), we get a palindrome (3789559873).

The spelling of 2002147871 in words is "two billion, two million, one hundred forty-seven thousand, eight hundred seventy-one".