2311123444 has 72 divisors (see below), whose sum is σ = 5090940288. Its totient is φ = 897462720.

The previous prime is 2311123417. The next prime is 2311123447. The reversal of 2311123444 is 4443211132.

It is a super-2 number, since 2×2311123444² = 10682583146812842272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2311123447) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 227514 + ... + 237454.

It is an arithmetic number, because the mean of its divisors is an integer number (70707504).

Almost surely, 2^2311123444 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2311123444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2545470144).

2311123444 is an abundant number, since it is smaller than the sum of its proper divisors (2779816844).

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

2311123444 is a wasteful number, since it uses less digits than its factorization.

2311123444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10013 (or 9992 counting only the distinct ones).

The product of its digits is 2304, while the sum is 25.

The square root of 2311123444 is about 48074.1452758133. The cubic root of 2311123444 is about 1322.1306735611.

Adding to 2311123444 its reverse (4443211132), we get a palindrome (6754334576).

The spelling of 2311123444 in words is "two billion, three hundred eleven million, one hundred twenty-three thousand, four hundred forty-four".