2001323015 has 4 divisors (see below), whose sum is σ = 2401587624. Its totient is φ = 1601058408.

The previous prime is 2001322997. The next prime is 2001323039. The reversal of 2001323015 is 5103231002.

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 2001323015 - 2²⁰ = 2000274439 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2001322984 and 2001323002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200132297 + ... + 200132306.

It is an arithmetic number, because the mean of its divisors is an integer number (600396906).

Almost surely, 2^2001323015 is an apocalyptic number.

2001323015 is a deficient number, since it is larger than the sum of its proper divisors (400264609).

2001323015 is an equidigital number, since it uses as much as digits as its factorization.

2001323015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400264608.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 2001323015 is about 44736.1488619662. The cubic root of 2001323015 is about 1260.1988043996.

Adding to 2001323015 its reverse (5103231002), we get a palindrome (7104554017).

The spelling of 2001323015 in words is "two billion, one million, three hundred twenty-three thousand, fifteen".