2001215143 has 4 divisors (see below), whose sum is σ = 2001700480. Its totient is φ = 2000729808.

The previous prime is 2001215089. The next prime is 2001215149. The reversal of 2001215143 is 3415121002.

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 2001215143 - 2¹³ = 2001206951 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2001215143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001215149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236430 + ... + 244747.

It is an arithmetic number, because the mean of its divisors is an integer number (500425120).

Almost surely, 2^2001215143 is an apocalyptic number.

2001215143 is a deficient number, since it is larger than the sum of its proper divisors (485337).

2001215143 is an equidigital number, since it uses as much as digits as its factorization.

2001215143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485336.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 2001215143 is about 44734.9431988015. The cubic root of 2001215143 is about 1260.1761622762.

Adding to 2001215143 its reverse (3415121002), we get a palindrome (5416336145).

The spelling of 2001215143 in words is "two billion, one million, two hundred fifteen thousand, one hundred forty-three".