1131533300 has 72 divisors (see below), whose sum is σ = 2588084352. Its totient is φ = 428560000.

The previous prime is 1131533269. The next prime is 1131533309. The reversal of 1131533300 is 33351311.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131533309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 229865 + ... + 234735.

It is an arithmetic number, because the mean of its divisors is an integer number (35945616).

Almost surely, 2^1131533300 is an apocalyptic number.

1131533300 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 1131533300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1294042176).

1131533300 is an abundant number, since it is smaller than the sum of its proper divisors (1456551052).

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

1131533300 is a wasteful number, since it uses less digits than its factorization.

1131533300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5009 (or 5002 counting only the distinct ones).

The product of its (nonzero) digits is 405, while the sum is 20.

The square root of 1131533300 is about 33638.2713586772. The cubic root of 1131533300 is about 1042.0513321381.

Adding to 1131533300 its reverse (33351311), we get a palindrome (1164884611).

The spelling of 1131533300 in words is "one billion, one hundred thirty-one million, five hundred thirty-three thousand, three hundred".