2001231323 has 16 divisors (see below), whose sum is σ = 2464121856. Its totient is φ = 1582705440.

The previous prime is 2001231299. The next prime is 2001231371. The reversal of 2001231323 is 3231321002.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001231323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2001231523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 353090 + ... + 358712.

It is an arithmetic number, because the mean of its divisors is an integer number (154007616).

Almost surely, 2^2001231323 is an apocalyptic number.

2001231323 is a deficient number, since it is larger than the sum of its proper divisors (462890533).

2001231323 is a wasteful number, since it uses less digits than its factorization.

2001231323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9554.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 2001231323 is about 44735.1240414062. The cubic root of 2001231323 is about 1260.1795584787.

Adding to 2001231323 its reverse (3231321002), we get a palindrome (5232552325).

The spelling of 2001231323 in words is "two billion, one million, two hundred thirty-one thousand, three hundred twenty-three".