1131113216 has 72 divisors (see below), whose sum is σ = 2353461600. Its totient is φ = 541900800.

The previous prime is 1131113201. The next prime is 1131113239. The reversal of 1131113216 is 6123111311.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1120520 + ... + 1121528.

Almost surely, 2^1131113216 is an apocalyptic number.

1131113216 is a gapful number since it is divisible by the number (16) 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 1131113216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1176730800).

1131113216 is an abundant number, since it is smaller than the sum of its proper divisors (1222348384).

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

1131113216 is a wasteful number, since it uses less digits than its factorization.

1131113216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1205 (or 1191 counting only the distinct ones).

The product of its digits is 108, while the sum is 20.

The square root of 1131113216 is about 33632.0266412835. The cubic root of 1131113216 is about 1041.9223616298.

Adding to 1131113216 its reverse (6123111311), we get a palindrome (7254224527).

The spelling of 1131113216 in words is "one billion, one hundred thirty-one million, one hundred thirteen thousand, two hundred sixteen".