2001115331 has 16 divisors (see below), whose sum is σ = 2115953280. Its totient is φ = 1890419520.

The previous prime is 2001115301. The next prime is 2001115343. The reversal of 2001115331 is 1335111002.

It is a cyclic number.

It is not a de Polignac number, because 2001115331 - 2³⁰ = 927373507 is a prime.

It is a super-2 number, since 2×2001115331² = 8008925135926479122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001115301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155900 + ... + 168246.

It is an arithmetic number, because the mean of its divisors is an integer number (132247080).

Almost surely, 2^2001115331 is an apocalyptic number.

2001115331 is a deficient number, since it is larger than the sum of its proper divisors (114837949).

2001115331 is a wasteful number, since it uses less digits than its factorization.

2001115331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12514.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 2001115331 is about 44733.8275916560. The cubic root of 2001115331 is about 1260.1552112065.

Adding to 2001115331 its reverse (1335111002), we get a palindrome (3336226333).

The spelling of 2001115331 in words is "two billion, one million, one hundred fifteen thousand, three hundred thirty-one".