1131244200 has 144 divisors (see below), whose sum is σ = 3821407200. Its totient is φ = 299894400.

The previous prime is 1131244187. The next prime is 1131244223. The reversal of 1131244200 is 24421311.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 320445 + ... + 323955.

It is an arithmetic number, because the mean of its divisors is an integer number (26537550).

Almost surely, 2^1131244200 is an apocalyptic number.

1131244200 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 1131244200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1910703600).

1131244200 is an abundant number, since it is smaller than the sum of its proper divisors (2690163000).

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

1131244200 is a wasteful number, since it uses less digits than its factorization.

1131244200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3712 (or 3700 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1131244200 is about 33633.9738954528. The cubic root of 1131244200 is about 1041.9625786152.

Adding to 1131244200 its reverse (24421311), we get a palindrome (1155665511).

The spelling of 1131244200 in words is "one billion, one hundred thirty-one million, two hundred forty-four thousand, two hundred".