11131500 has 96 divisors (see below), whose sum is σ = 33388992. Its totient is φ = 2880000.

The previous prime is 11131499. The next prime is 11131501. The reversal of 11131500 is 513111.

It is an interprime number because it is at equal distance from previous prime (11131499) and next prime (11131501).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (11131501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61410 + ... + 61590.

It is an arithmetic number, because the mean of its divisors is an integer number (347802).

Almost surely, 2^11131500 is an apocalyptic number.

11131500 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 11131500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16694496).

11131500 is an abundant number, since it is smaller than the sum of its proper divisors (22257492).

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

11131500 is a wasteful number, since it uses less digits than its factorization.

11131500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244 (or 232 counting only the distinct ones).

The product of its (nonzero) digits is 15, while the sum is 12.

The square root of 11131500 is about 3336.3902649420. The cubic root of 11131500 is about 223.2807232331.

Adding to 11131500 its reverse (513111), we get a palindrome (11644611).

The spelling of 11131500 in words is "eleven million, one hundred thirty-one thousand, five hundred".