11431311240 has 128 divisors (see below), whose sum is σ = 36143625600. Its totient is φ = 2884331520.

The previous prime is 11431311233. The next prime is 11431311253. The reversal of 11431311240 is 4211313411.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2170210 + ... + 2175470.

It is an arithmetic number, because the mean of its divisors is an integer number (282372075).

Almost surely, 2^11431311240 is an apocalyptic number.

11431311240 is a gapful number since it is divisible by the number (10) 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 11431311240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18071812800).

11431311240 is an abundant number, since it is smaller than the sum of its proper divisors (24712314360).

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

11431311240 is a wasteful number, since it uses less digits than its factorization.

11431311240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6247 (or 6243 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 11431311240 its reverse (4211313411), we get a palindrome (15642624651).

The spelling of 11431311240 in words is "eleven billion, four hundred thirty-one million, three hundred eleven thousand, two hundred forty".