2001311000 has 64 divisors (see below), whose sum is σ = 5043336480. Its totient is φ = 738940800.

The previous prime is 2001310981. The next prime is 2001311017. The reversal of 2001311000 is 1131002.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63974 + ... + 89973.

Almost surely, 2^2001311000 is an apocalyptic number.

2001311000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001311000 is an abundant number, since it is smaller than the sum of its proper divisors (3042025480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2001311000 is a wasteful number, since it uses less digits than its factorization.

2001311000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153981 (or 153967 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 2001311000 is about 44736.0145743896. The cubic root of 2001311000 is about 1260.1962825147.

Adding to 2001311000 its reverse (1131002), we get a palindrome (2002442002).

It can be divided in two parts, 20013 and 11000, that added together give a palindrome (31013).

The spelling of 2001311000 in words is "two billion, one million, three hundred eleven thousand".