2001445500 has 48 divisors (see below), whose sum is σ = 5828213664. Its totient is φ = 533718400.

The previous prime is 2001445499. The next prime is 2001445531. The reversal of 2001445500 is 55441002.

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, 665649 + ... + 668648.

It is an arithmetic number, because the mean of its divisors is an integer number (121421118).

Almost surely, 2^2001445500 is an apocalyptic number.

2001445500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001445500 is an abundant number, since it is smaller than the sum of its proper divisors (3826768164).

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

2001445500 is a wasteful number, since it uses less digits than its factorization.

2001445500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1334319 (or 1334307 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 2001445500 is about 44737.5178122345. The cubic root of 2001445500 is about 1260.2245127769.

Adding to 2001445500 its reverse (55441002), we get a palindrome (2056886502).

The spelling of 2001445500 in words is "two billion, one million, four hundred forty-five thousand, five hundred".