2312111560 has 96 divisors (see below), whose sum is σ = 5734874880. Its totient is φ = 838316160.

The previous prime is 2312111519. The next prime is 2312111563. The reversal of 2312111560 is 651112132.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (2312111563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2937487 + ... + 2938273.

It is an arithmetic number, because the mean of its divisors is an integer number (59738280).

Almost surely, 2^2312111560 is an apocalyptic number.

2312111560 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 2312111560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2867437440).

2312111560 is an abundant number, since it is smaller than the sum of its proper divisors (3422763320).

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

2312111560 is a wasteful number, since it uses less digits than its factorization.

2312111560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1427 (or 1412 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 2312111560 is about 48084.4211777578. The cubic root of 2312111560 is about 1322.3190714497.

Adding to 2312111560 its reverse (651112132), we get a palindrome (2963223692).

It can be divided in two parts, 23121 and 11560, that multiplied together give a triangular number (267278760 = T₂₃₁₂₀).

The spelling of 2312111560 in words is "two billion, three hundred twelve million, one hundred eleven thousand, five hundred sixty".