2001111500 has 24 divisors (see below), whose sum is σ = 4370428608. Its totient is φ = 800444400.

The previous prime is 2001111493. The next prime is 2001111517. The reversal of 2001111500 is 51111002.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2000612 + ... + 2001611.

It is an arithmetic number, because the mean of its divisors is an integer number (182101192).

Almost surely, 2^2001111500 is an apocalyptic number.

2001111500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001111500 is an abundant number, since it is smaller than the sum of its proper divisors (2369317108).

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

2001111500 is a wasteful number, since it uses less digits than its factorization.

2001111500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4002242 (or 4002230 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 11.

The square root of 2001111500 is about 44733.7847716913. The cubic root of 2001111500 is about 1260.1544070453.

Adding to 2001111500 its reverse (51111002), we get a palindrome (2052222502).

The spelling of 2001111500 in words is "two billion, one million, one hundred eleven thousand, five hundred".