2001523111 has 8 divisors (see below), whose sum is σ = 2330614944. Its totient is φ = 1683221280.

The previous prime is 2001523087. The next prime is 2001523127. The reversal of 2001523111 is 1113251002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2001523111 - 2⁵ = 2001523079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001523211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2697100 + ... + 2697841.

It is an arithmetic number, because the mean of its divisors is an integer number (291326868).

Almost surely, 2^2001523111 is an apocalyptic number.

2001523111 is a deficient number, since it is larger than the sum of its proper divisors (329091833).

2001523111 is an equidigital number, since it uses as much as digits as its factorization.

2001523111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5395001.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 2001523111 is about 44738.3852077833. The cubic root of 2001523111 is about 1260.2408020073.

Adding to 2001523111 its reverse (1113251002), we get a palindrome (3114774113).

The spelling of 2001523111 in words is "two billion, one million, five hundred twenty-three thousand, one hundred eleven".