1131443000 has 128 divisors (see below), whose sum is σ = 2731622400. Its totient is φ = 438480000.

The previous prime is 1131442981. The next prime is 1131443021. The reversal of 1131443000 is 3441311.

It is a self number, because there is not a number n which added to its sum of digits gives 1131443000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7492925 + ... + 7493075.

It is an arithmetic number, because the mean of its divisors is an integer number (21340800).

Almost surely, 2^1131443000 is an apocalyptic number.

1131443000 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 1131443000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1365811200).

1131443000 is an abundant number, since it is smaller than the sum of its proper divisors (1600179400).

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

1131443000 is a wasteful number, since it uses less digits than its factorization.

1131443000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358 (or 344 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1131443000 is about 33636.9291107259. The cubic root of 1131443000 is about 1042.0236117171.

Adding to 1131443000 its reverse (3441311), we get a palindrome (1134884311).

The spelling of 1131443000 in words is "one billion, one hundred thirty-one million, four hundred forty-three thousand".