2001323331 has 24 divisors (see below), whose sum is σ = 3340902240. Its totient is φ = 1130760576.

The previous prime is 2001323323. The next prime is 2001323381. The reversal of 2001323331 is 1333231002.

2001323331 is a `hidden beast` number, since 200 + 132 + 3 + 331 = 666.

It is not a de Polignac number, because 2001323331 - 2³ = 2001323323 is a prime.

It is a super-2 number, since 2×2001323331² = 8010590150409871122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2001323381) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 172860 + ... + 184073.

It is an arithmetic number, because the mean of its divisors is an integer number (139204260).

Almost surely, 2^2001323331 is an apocalyptic number.

2001323331 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2001323331 is a deficient number, since it is larger than the sum of its proper divisors (1339578909).

2001323331 is a wasteful number, since it uses less digits than its factorization.

2001323331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357035 (or 357032 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

The square root of 2001323331 is about 44736.1523937855. The cubic root of 2001323331 is about 1260.1988707262.

Adding to 2001323331 its reverse (1333231002), we get a palindrome (3334554333).

The spelling of 2001323331 in words is "two billion, one million, three hundred twenty-three thousand, three hundred thirty-one".