2321111540 has 72 divisors (see below), whose sum is σ = 5397617736. Its totient is φ = 837760000.

The previous prime is 2321111531. The next prime is 2321111587. The reversal of 2321111540 is 451111232.

2321111540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 239197156 + 2081914384 = 15466^2 + 45628^2 .

It is a super-2 number, since 2×2321111540² = 10775117562242343200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 328040 + ... + 335040.

It is an arithmetic number, because the mean of its divisors is an integer number (74966913).

Almost surely, 2^2321111540 is an apocalyptic number.

2321111540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2321111540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2698808868).

2321111540 is an abundant number, since it is smaller than the sum of its proper divisors (3076506196).

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

2321111540 is a wasteful number, since it uses less digits than its factorization.

2321111540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7169 (or 7156 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 2321111540 is about 48177.9154800205. The cubic root of 2321111540 is about 1324.0325754194.

Adding to 2321111540 its reverse (451111232), we get a palindrome (2772222772).

The spelling of 2321111540 in words is "two billion, three hundred twenty-one million, one hundred eleven thousand, five hundred forty".