1131324216 has 128 divisors (see below), whose sum is σ = 3196800000. Its totient is φ = 330670080.

The previous prime is 1131324209. The next prime is 1131324221. The reversal of 1131324216 is 6124231311.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

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, 905160 + ... + 906408.

It is an arithmetic number, because the mean of its divisors is an integer number (24975000).

Almost surely, 2^1131324216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1131324216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1598400000).

1131324216 is an abundant number, since it is smaller than the sum of its proper divisors (2065475784).

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

1131324216 is a wasteful number, since it uses less digits than its factorization.

1131324216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1389 (or 1385 counting only the distinct ones).

The product of its digits is 864, while the sum is 24.

The square root of 1131324216 is about 33635.1633859567. The cubic root of 1131324216 is about 1041.9871449914.

Adding to 1131324216 its reverse (6124231311), we get a palindrome (7255555527).

The spelling of 1131324216 in words is "one billion, one hundred thirty-one million, three hundred twenty-four thousand, two hundred sixteen".