2001541531163 has 4 divisors (see below), whose sum is σ = 2002932457920. Its totient is φ = 2000150604408.

The previous prime is 2001541531139. The next prime is 2001541531217. The reversal of 2001541531163 is 3611351451002.

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 2001541531163 - 2¹² = 2001541527067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001541531663) 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, 695461220 + ... + 695464097.

It is an arithmetic number, because the mean of its divisors is an integer number (500733114480).

Almost surely, 2^{2001541531163} is an apocalyptic number.

2001541531163 is a deficient number, since it is larger than the sum of its proper divisors (1390926757).

2001541531163 is a wasteful number, since it uses less digits than its factorization.

2001541531163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1390926756.

The product of its (nonzero) digits is 10800, while the sum is 32.

Adding to 2001541531163 its reverse (3611351451002), we get a palindrome (5612892982165).

The spelling of 2001541531163 in words is "two trillion, one billion, five hundred forty-one million, five hundred thirty-one thousand, one hundred sixty-three".