2001313856 has 28 divisors (see below), whose sum is σ = 3973573968. Its totient is φ = 1000098432.

The previous prime is 2001313843. The next prime is 2001313859. The reversal of 2001313856 is 6583131002.

It is not an unprimeable number, because it can be changed into a prime (2001313859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122015 + ... + 137441.

It is an arithmetic number, because the mean of its divisors is an integer number (141913356).

Almost surely, 2^2001313856 is an apocalyptic number.

It is an amenable number.

2001313856 is a deficient number, since it is larger than the sum of its proper divisors (1972260112).

2001313856 is a wasteful number, since it uses less digits than its factorization.

2001313856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17466 (or 17456 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 2001313856 is about 44736.0464949687. The cubic root of 2001313856 is about 1260.1968819749.

Adding to 2001313856 its reverse (6583131002), we get a palindrome (8584444858).

The spelling of 2001313856 in words is "two billion, one million, three hundred thirteen thousand, eight hundred fifty-six".