2051231140 has 72 divisors (see below), whose sum is σ = 5093158392. Its totient is φ = 691729920.

The previous prime is 2051231093. The next prime is 2051231141. The reversal of 2051231140 is 411321502.

It can be written as a sum of positive squares in 4 ways, for example, as 13972644 + 2037258496 = 3738^2 + 45136^2 .

It is not an unprimeable number, because it can be changed into a prime (2051231141) 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, 42624 + ... + 76936.

It is an arithmetic number, because the mean of its divisors is an integer number (70738311).

Almost surely, 2^2051231140 is an apocalyptic number.

2051231140 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 2051231140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2546579196).

2051231140 is an abundant number, since it is smaller than the sum of its proper divisors (3041927252).

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

2051231140 is a wasteful number, since it uses less digits than its factorization.

2051231140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34397 (or 34388 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 2051231140 is about 45290.5193169608. The cubic root of 2051231140 is about 1270.5883441770.

Adding to 2051231140 its reverse (411321502), we get a palindrome (2462552642).

The spelling of 2051231140 in words is "two billion, fifty-one million, two hundred thirty-one thousand, one hundred forty".