11131031040 has 160 divisors (see below), whose sum is σ = 35843955840. Its totient is φ = 2946637824.

The previous prime is 11131031039. The next prime is 11131031057. The reversal of 11131031040 is 4013013111.

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1062307 + ... + 1072733.

It is an arithmetic number, because the mean of its divisors is an integer number (224024724).

Almost surely, 2^11131031040 is an apocalyptic number.

11131031040 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 11131031040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17921977920).

11131031040 is an abundant number, since it is smaller than the sum of its proper divisors (24712924800).

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

11131031040 is a wasteful number, since it uses less digits than its factorization.

11131031040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10592 (or 10576 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 11131031040 its reverse (4013013111), we get a palindrome (15144044151).

The spelling of 11131031040 in words is "eleven billion, one hundred thirty-one million, thirty-one thousand, forty".