2001215331 has 12 divisors (see below), whose sum is σ = 2903053608. Its totient is φ = 1328416224.

The previous prime is 2001215311. The next prime is 2001215341. The reversal of 2001215331 is 1335121002.

It is a de Polignac number, because none of the positive numbers 2^k-2001215331 is a prime.

It is a super-3 number, since 3×2001215331³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (2001215311) 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 11 ways as a sum of consecutive naturals, for example, 475065 + ... + 479258.

It is an arithmetic number, because the mean of its divisors is an integer number (241921134).

Almost surely, 2^2001215331 is an apocalyptic number.

2001215331 is a deficient number, since it is larger than the sum of its proper divisors (901838277).

2001215331 is a wasteful number, since it uses less digits than its factorization.

2001215331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 954562 (or 954559 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 2001215331 is about 44734.9453000672. The cubic root of 2001215331 is about 1260.1762017378.

Adding to 2001215331 its reverse (1335121002), we get a palindrome (3336336333).

The spelling of 2001215331 in words is "two billion, one million, two hundred fifteen thousand, three hundred thirty-one".