1131131232 has 216 divisors, whose sum is σ = 4041627408. Its totient is φ = 293736960.

The previous prime is 1131131213. The next prime is 1131131233. The reversal of 1131131232 is 2321311311.

1131131232 is a `hidden beast` number, since 11 + 311 + 312 + 32 = 666.

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

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131131233) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 241618 + ... + 246254.

It is an arithmetic number, because the mean of its divisors is an integer number (18711238).

Almost surely, 2^1131131232 is an apocalyptic number.

1131131232 is a gapful number since it is divisible by the number (12) 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 1131131232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2020813704).

1131131232 is an abundant number, since it is smaller than the sum of its proper divisors (2910496176).

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

1131131232 is a wasteful number, since it uses less digits than its factorization.

1131131232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4682 (or 4660 counting only the distinct ones).

The product of its digits is 108, while the sum is 18.

The square root of 1131131232 is about 33632.2944801570. The cubic root of 1131131232 is about 1041.9278933995.

Adding to 1131131232 its reverse (2321311311), we get a palindrome (3452442543).

The spelling of 1131131232 in words is "one billion, one hundred thirty-one million, one hundred thirty-one thousand, two hundred thirty-two".