2311445140 has 12 divisors (see below), whose sum is σ = 4854034836. Its totient is φ = 924578048.

The previous prime is 2311445119. The next prime is 2311445159. The reversal of 2311445140 is 415441132.

It can be written as a sum of positive squares in 2 ways, for example, as 1557723024 + 753722116 = 39468^2 + 27454^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57786109 + ... + 57786148.

It is an arithmetic number, because the mean of its divisors is an integer number (404502903).

Almost surely, 2^2311445140 is an apocalyptic number.

2311445140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2311445140 is an abundant number, since it is smaller than the sum of its proper divisors (2542589696).

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

2311445140 is a wasteful number, since it uses less digits than its factorization.

2311445140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115572266 (or 115572264 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 2311445140 is about 48077.4909911073. The cubic root of 2311445140 is about 1322.1920152169.

Adding to 2311445140 its reverse (415441132), we get a palindrome (2726886272).

The spelling of 2311445140 in words is "two billion, three hundred eleven million, four hundred forty-five thousand, one hundred forty".